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INHALTSVERZEICHNIS Visual Basic 6.0 - Fortgeschrittene Programmierung

1 Objektorientierte Programmierung.............. 4

1.1 Grundlagen der objektorientiertenProgrammierung...............................................4

1.1.1 Klassen, Methoden, Eigenschaften

und Objekte .............................................4

1.1.2 Definition von Objekten, Objektvariablen

und Zugriff auf deren Eigenschaften und

Methoden.................................................6

1.2 Vordefinierte Objekte von Visual Basic...........10

1.3 Definieren eigener Objektklassen...................12

1.3.1 Gültigkeitsbereiche der Eigenschaften

und Methoden ........................................12

1.3.2 Ereignisse von Klassen..........................13

1.3.3 Übergabe von Objekten als Parameter

an Prozeduren bzw. als Rückgabewerte

von Funktionen ......................................15

1.3.4 Eigenschaftsprozeduren.........................16

1.3.5 Eigene Ereignisse ..................................18

1.3.6 Klassen implementieren.........................19

1.4 Der Klassengenerator.....................................23

1.5 Übungen.........................................................23

2 Grafikprogrammierung ............................... 24

2.1 Grundlagen der Grafikprogrammierung ..........24

2.1.1 Die Picturebox........................................24

2.1.2 Grafikeigenschaften ...............................25

2.1.3 Grafikmethoden .....................................26

2.1.4 Laden und Speichern von Bitmaps

und Icons ...............................................30

2.2 Das Koordinatensystem .................................32

2.3 Bildlaufleisten (Scrollbars) für diePictureBox ......................................................33

2.4 Grundlagen - Drucken ....................................35

2.4.1 Der Druckdialog .....................................35

2.4.2 Drucken .................................................37

2.5 Übung.............................................................39

3 API-Programmierung .................................. 40

3.1 Allgemeines zum Windows-API......................40

3.2 API-Funktionen aufrufen und deklarieren .......40

3.3 API-Viewer .....................................................41

3.4 Parameterübergabe........................................42

3.4.1 Übergabe von Werten oder Variablen ....42

3.4.2 Callback-Adressen.................................44

3.5 Ausgewählte API-Funktionen .........................46

3.5.1 GDI-Funktionen als Ergänzung zu

den Visual-Basic-Grafikfunktionen..........46

3.5.2 Funktionen zur Speicher- und

Systemverwaltung ................................. 49

3.5.3 Fenster- und Mausfunktionen ................ 50

3.6 Übung ............................................................53

4 Registrierdatenbank ....................................54

4.1 Einführung......................................................54

4.2 Registrierungseditor und Aufbauder Registry....................................................54

4.3 Sichern und Wiederherstellen der Registry ....57

4.4 Manipulieren der Registry ..............................57

4.5 Registry-Funktionen des Windows-API ..........60

4.6 Arbeiten mit verschiedenen Betriebs-systemen........................................................62

4.7 Dateierweiterungen ........................................62

4.8 Übung ............................................................63

5 Fortschrittliche Programmiertechniken.....64

5.1 Begrüßungsbildschirm und Anmeldedialog ....64

5.1.1 Begrüßungsbildschirm ........................... 64

5.1.2 Anmeldedialog....................................... 65

5.2 Andere vorgefertigte Formulare......................65

5.3 Hintergrundbilder............................................66

5.4 Mit MDI-Fenstern arbeiten..............................68

5.5 Namen für Variablen und Funktionen.............70

5.6 Der Mauszeiger ..............................................70

5.7 Übung ............................................................72

6 Einführung in die Datenbank-

programmierung...........................................74

6.1 Aufbau und Funktion einer Datenbank ...........74

6.1.1 Datenbankbegriffe ................................. 74

6.1.2 Datenbankentwurf.................................. 77

6.1.3 Datenbanken im Netzwerk..................... 79

6.1.4 Datenbankformate ................................. 79

6.2 Visual Data Manager "VisData" ......................79

6.3 Erstellen von Datenbankprogrammen ............83

6.4 Übung ............................................................85

7 Arbeiten mit Abfragen .................................86

7.1 Einführung......................................................86

7.2 Einführung in SQL ..........................................86

7.2.1 Sprachumfang von SQL......................... 87

7.2.2 Die Datendefinitionssprache DDL .......... 87

7.2.3 Die Abfragesprache DQL....................... 88

Inhaltsverzeichnis I

7.2.4 Der Join ................................................. 91

7.2.5 Datenaktualisierung mit DML ................. 92

7.3 Dynamisches SQL ......................................... 94

7.3.1 #"!-Anweisung dynamisch aufbauen.... 94

7.3.2 Parametrisierte Abfragen ....................... 94

7.4 Übung ............................................................ 95

8 ADO - Datenumgebungs-Designer ............ 96

8.1 ADO, DAO und RDO...................................... 96

8.2 Die ADO-Objekthierarchie.............................. 97

8.3 Der Datenumgebungs-Designer..................... 98

8.3.1 DataEnvironment-Objekt erzeugen.... 98

8.3.2 Connection-Objekt erstellen................ 99

8.3.3 Command-Objekte ................................ 100

8.4 Datenansichtsfenster ................................... 106

8.5 Überblick über die Steuerelemente fürdie Datenbankprogrammierung.................... 107

8.6 Übung .......................................................... 108

9 ADO-Objekte .............................................. 110

9.1 Datenbankverbindung.................................. 110

9.1.1 Verbindung öffnen ............................... 110

9.1.2 Verbindung schließen .......................... 112

9.1.3 SQL-Befehle ausführen ....................... 112

9.1.4 Datenbankinformationen...................... 113

9.1.5 Transaktionen...................................... 114

9.2 Command-Objekte ........................................ 116

9.2.1 Eigenschaften einesCommand-Objekts ................................ 117

9.2.2 Die Execute-Methode ........................ 118

9.3 Recordsets................................................... 120

9.3.1 Aufbauen eines Recodsets .................. 120

9.3.2 Bewegen im Recordset ........................ 121

9.3.3 Fields................................................... 124

9.3.4 Datensätze sortieren und suchen......... 128

9.3.5 Datensätze bearbeiten......................... 128

9.3.6 Ereignisse und Fehlerbehandlung........ 130

9.4 Error-Objekte............................................. 132

9.5 Weiterführendes zu Recordsets ................... 133

9.5.1 Stapelverarbeitung............................... 133

9.5.2 Hierarchische Recordsets .................... 134

9.6 Übung .......................................................... 136

10 Reports ....................................................... 138

10.1 Allgemeines zum Datenberichtsdesigner(DataReport) ................................................ 138

10.2 Erstellen eines Reports ................................ 139

10.3 Steuerelemente für Reports ......................... 141

10.4 Nachteile des DataReports .......................... 143

10.5 Übung.......................................................... 144

11 OLE und ActiveX ....................................... 146

11.1 Einführung in ActiveX................................... 146

11.2 OLE ............................................................. 146

11.3 ActiveX-Automation am Beispiel Office 97... 150

11.4 Übung.......................................................... 154

12 ActiveX-Komponenten.............................. 156

12.1 Einführung ................................................... 156

12.2 Erstellen einer ActiveX-Komponente............ 157

12.2.1 Entwicklung..........................................157

12.2.2 Testen..................................................158

12.2.3 Fertigstellen..........................................160

12.3 Multithreading .............................................. 162

12.4 Kommunikation zwischen Clientund Server ................................................... 163

12.4.1 Synchrone Kommunikation...................163

12.4.2 Asynchrone Kommunikation .................163

12.5 Übung.......................................................... 166

13 ActiveX-Steuerelemente ........................... 168

13.1 Erstellen eines Steuerelements -Einführung ................................................... 168

13.2 Grundlagen von ActiveX-Steuerelementen ......................................... 170

13.2.1 Das UserControl-Objekt .......................170

13.2.2 Eigenschaftenseiten .............................174

13.3 Verwendung von Assistenten....................... 176

13.4 Übung.......................................................... 177

A Weitergeben von Anwendungen ............. 178

A.1 Der Paket- und Weitergabe-Assistent .......... 178

Stichwortverzeichnis ..................................... 182

3 Visual Basic 6.0 - Fortgeschrittene Programmierung

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R = GetBkColor(Form1.hdc)


.-

AXUU MNZ @gLTPJKN_NZ\ WRLQ\ J][PN_NZ\N\ _NZMNW& TJWW MNZ 5]WT\RXW[J]OZ]O J]LQ [X NZOXUPNW/

GetBkColor Form1.hdc

ARWM TNRWN ?JZJVN\NZ NZOXZMNZURLQ& TfWWNW ARN UNNZN :UJVVNZW [LQZNRKNW XMNZ MRN :UJVVNZW PJWb _NPUJ[[NW/

R = GetTickCount() XMNZ R = GetTickCount

3RN ?JZJVN\NZgKNZPJKN R[\ KNR MNZ DNZ_NWM]WP MNZ 0?8'5]WT\RXWNW MJ[ PZfd\N ?ZXKUNV& _NRU MRN BaYNW MNZgKNZPNKNWNW ?JZJVN\NZ PJWb N`JT\ [\RVVNW Vg[[NW( 3RN 0?8'5]WT\RXWNW [RWM RW MNZ ?ZXPZJVVRNZ[YZJLQN 2PN[LQZRNKNW ]WM N[ R[\ NZOXZMNZURLQ& MRN 2'3J\NW\aYNW RW MNZ Declare'0W_NR[]WP 8QZN[ ?ZXPZJVV[ RW DR[]JU'1J[RL'3J\NW\aYNW b] TXW^NZ\RNZNW( AXUJWPN ARN 0?8'5]WT\RXWNW gKNZ MNW 0?8'DRN_NZ NRWOgPNW& [RWM MRN NW\'[YZNLQNWMNW DR[]JU'1J[RL'3J\NW\aYNW OgZ MRN ?JZJVN\NZ [LQXW NW\QJU\NW( 0WMNZ[ OXZV]URNZ\& MRN BaYNW MNZ?JZJVN\NZ [RWM MXZ\ KNZNR\[ RW DR[]JU'1J[RL'3J\NW\aYNW TXW^NZ\RNZ\( ENWW ARN JUUNZMRWP[ 5]WT\RXWNW J]OZ]ONW&MRN WRLQ\ RV 0?8'DRN_NZ ^NZbNRLQWN\ [RWM& Vg[[NW ARN MRN[N 0WYJ[[]WP [NUK[\ ^XZWNQVNW( 3J[ R[\ WRLQ\ PJWbNRWOJLQ& MJ 2 b]V BNRU JWMNZN 3J\NW\aYNW ^NZ_NWMN\( 8W MNZ OXUPNWMNW BJKNUUN [RWM MRN _RLQ\RP[\NW 2'3J\NW'\aYNW VR\ 8QZNZ DR[]JU'1J[RL'4W\[YZNLQ]WP J]OPNOgQZ\( Var_Name [\NQ\ OgZ MRN b] ^NZNRWKJZNWMNW DJZRJKUNW'WJVNW(

#!$&1)-13. )-10./)'*)-() %+02&,!"&0+'! $&1)-13.)-

1GB4& 270@ ByVal Var_Name As Byte

0B><& A7>@B& E>@3 ByVal Var_Name As Integer

;?E>@3 Var_Name As Integer

1>>; ByVal Var_Name As Long

2>;>@@45 ByVal Var_Name As Long

3E>@3& 8=B&C8=B& ;>=6 ByVal Var_Name As Long

5;>0B ByVal Var_Name As Single

3>C1;4 ByVal Var_Name As Double

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1AB@ $DJZI=JVN Var_Name As String

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;?3E>@3&;?8=B&;?C8=B Var_Name As Long

;?AB@& ;?2AB@ ByVal Var_Name As String

;?D>83 Var_Name As Any

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=C;; As Any oderByVal Var_Name As Long

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ERZM RW 2 far *Var_Name JWPNPNKNW& V]d MJ[ ALQUg[[NU_XZ\ ByVal NW\OJUUNW(

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$*01%+ !%0*& #/-(/%,,*'/0./%&)' "

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3.4.2 Callback-Adressen

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AddressOf Funktionsname

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Function AdresseDerFunktion (ByVal ZeigerVariable As Long) As Long

AdresseDerFunktion = ZeigerVariable

End Function


&'

,>DE:JB>J>G 4B> =>G 5PI =>J 7:JB:;E>G# MG= JM?>G 4B> =B> .MGDLBHG :M?# BG=>F 4B> :EK 3:J:F>L>J AddressOfFBL =>F 2:F>G /AJ>J +:EE;:<D$.MGDLBHG :G@>;>G%

StrukturName.Zeiger = AdresseDerFunktion(AddressOf MeineFunktion)

*>BKIB>EKO>BK> FMS =B> )3/$.MGDLBHG SetTimer FBL >BG>J +:EE;:<D$)=J>KK> :M?@>JM?>G O>J=>G%

SetTimer (hWnd, 1, 2000, AddressOf TimerFunktion)

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"('%$&) ##$"&!'!%

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!

"

#

$

Option Explicit

Declare Function SetTimer Lib "user32" (ByVal hWnd As Long, _

ByVal nIDEvent As Long, _

ByVal uElapse As Long, _

ByVal lpTimerFunc As Long) As Long

Declare Function KillTimer Lib "user32" (ByVal hWnd As Long, _

ByVal nIDEvent As Long) As Long

Public Sub Blinken(hwnd As Long, uMsg As Long, _

idEvent As Long, dwTime As Long)

Form1.Label1.Visible = Not Form1.Label1.Visible

End Sub

! ,B> )3/$.MGDLBHG SetTimer !KL:G=:J=FTSB@ U??>GLEB<A" OBJ= =>DE:JB>JL%" 8MF 0UK<A>G =>K 5BF>JK OBJ= =B> )3/$.MGDLBHG KillTimer =>DE:JB>JL%# ,:K 6GL>JIJH@J:FF Blinken OBJ= =>?BGB>JL MG= KITL>J :EK +:EE;:<D$.MGDLBHG =>J SetTimer$.MGDLBHG

V;>J@>;>G%$ 6F >BG 0:;>E ;EBGD>G QM E:KK>G# OBJ= =B> -B@>GK<A:?L Visible :;O><AK>EG= :M? True MG= False

@>K>LQL%

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VOID CALLBACK TimerProc( HWND hwnd, // handle of window for timer messages

UINT uMsg, // WM_TIMER message

UINT idEvent, // timer identifier

DWORD dwTime); // current system time

)M<A O>GG 4B> =B> R;>J@:;>I:J:F>L>J ?VJ /AJ> 3JHQ>=MJ GB<AL ;>GULB@>G# FVKK>G 4B> =B>K> :G@>;>G% 4B>JBKDB>J>G KHGKL >BG> 8M@JB??KN>JE>LQMG@# =B> /AJ 7BKM:E *:KB< QMF );KLMJQ ;JBG@L% 4ITL>KL>GK AB>J FVKK>G 4B>>BG> 5PI:GI:KKMG@ OB> QMNHJ ;>K<AJB>;>G =MJ<A?VAJ>G%

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)*

!

"

#

$

%

&

'

(

Dim TimerNr, KillOK As Long

Private Sub Blink_Click()

If TimerNr = 0 Then

TimerNr = SetTimer(hwnd, 1, 300, AddressOf Blinken)

Else

KillOK = KillTimer(hwnd, TimerNr)

Label1.Visible = False

TimerNr = 0

End If

End Sub

Private Sub Form_Load()

TimerNr = 0

End Sub

Private Sub Ende_Click()

End

End Sub

! TimerNr QKB KillOK OGKB <?NG?@ICK# BGC TQN -QDK?FJC BCN 9YAHE?@CSCNPC BCN -84$1QKHPGLKCK BGCKCKQKB BCOF?I@ ?IO Long RCNCGK@?NP SCNBCK JYOOCK%

" /GC <?NG?@IC TimerNr SGNB ?QD 0 ECMNYDP%# 3?P TimerNr BCK =CNP 0# SGNB BGC 1QKHPGLK SetTimer ?QDECNQDCK% TimerNr SGNB RLK BCN 1QKHPGLK

SetTimer JGP CGKCJ 9YAHE?@CSCNP @CICEP% .CG LNBKQKEOECJWVCN -QODYFNQKE BCN 1QKHPGLK GOP BGCOCN=CNP EICGAF BCN 7QJJCN BCO ;GJCNO# BCN CNTCQEP SQNBC% 5LKKPC HCGK ;GJCN CNTCQEP SCNBCK# SGNB BCN=CNP 0 TQNYAHECEC@CK%

$$& =GNB B?O Click$0NCGEKGO ?QOECIXOP# SCKK @CNCGPO CGK ;GJCN CNTCQEP SQNBC !TimerNr , &"# B?KK SGNBBCN ;GJCN JGP BCN KillTimer$1QKHPGLK SGCBCN ECIXOAFP $ B?O @IGKHCKBC 6?@CI SGNB SGCBCN ?QOEC@ICKBCPQKB TimerNr ?QD 0 ECOCPTP%

' TimerNr SGNB JGP BCJ =CNP 0 RLN@CICEP%( 3GCN CNDLIEP B?O :AFIGCVCK BCN -KSCKBQKE%

3.5 Ausgewählte API-Funktionen

/GC 1QKHPGLKCK# BGC GK BGCOCJ -@OAFKGPP RLNECOPCIIP SCNBCK# OGKB KQN CGK HICGKCN ;CGI BCN GJ =GKBLSO$-84 RCN$DYE@?NCK 1QKHPGLKCK% 0O OLII 4FKCK FGCN KQN CGK ENL@CN U@CN@IGAH Y@CN BGC 0GKO?PTJXEIGAFHCGPCK BGCOCN1QKHPGLKCK RCNJGPPCIP SCNBCK%

3.5.1 GDI-Funktionen als Ergänzung zu den Visual-Basic-Grafikfunktionen

#')'%)! -)$ "-+.%)&-)(,'*)%) BGCKCK TQJ >CGAFKCK RLK 6GKGCK# .XECK# :CNGCK RLK 6GKGCK QKB .XECK !4JMLNP$@G@IGLPFCH+ 2!"('%!##"%

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()

PolyBezier

PolyBezierTo=BF@EJBO BFJB KABM IBEMBMB ,ZUFBM$3PMQBJ%

Polyline,

PolylineTo=BF@EJBO BFJ 9BMFB QKJ 4FJFBJNBDIBJOBJ%

SetArcDirection 9BOUO AFB =BF@EBJMF@EOPJD%

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Rectangle =BF@EJBO BFJ 8B@EOB@G%

Polygon =BF@EJBO BFJ 7KHTDKJ%

Pie =BF@EJBO BFJBJ +PNN@EJFOO BFJBM .HHFLNB >PN QFBM 7PJGOBJ%

PolyPolygon =BF@EJBO BFJB 9BMFB QKJ DBN@EHKNNBJBJ 7KHTDKJBJ%

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Notizen


()

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EndDoc ,CCLBCQ CGLCL -ORAI$2M@%

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StartDoc 8Q?OQCQ CGLCL -ORAI$2M@%

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ClosePrinter 8AFJGCX B?P ?LECEC@CLC -ORAICOM@HCIQ%

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PAFOGC@CL TCOBCL PMJJQCL%

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;GBCM"%

%1/+(,2 #'#$#"%#"(!&

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!

"

#

$

Public Declare Function Polygon Lib "gdi32" (ByVal hdc As Long, _

lpPoint As POINTAPI, ByVal nCount As Long) As Long

Public Type POINTAPI

x As Long

y As Long

End Type

Public Declare Function ExtFloodFill Lib "gdi32" (ByVal hdc As Long, _

ByVal x As Long, ByVal y As Long, ByVal crColor As Long, _

ByVal wFillType As Long) As Long

Public Const FLOODFILLBORDER = 0

! .P CODMJEQ BGC -CIJ?O?QGML BCO /RLIQGML Polygon%" -CO 9VN POINTAPI TGOB D[O BCL /RLIQGMLP?RDORD BCO /RLIQGML Polygon @CLZQGEQ%

# -GC -CIJ?O?QGML BCO /RLIQGML ExtFloodFill TGOB BROAFECD[FOQ%

$ .GLC 3MLPQ?LQC D[O BCL /RLIQGMLP?RDORD BCO /RLIQGML ExtFloodFill TGOB BCIJ?OGCOQ%

-GC COPQCL BOCG -CIJ?O?QGMLCL IZLLCL [@CO BCL +71$;GCTCO CGLECD[EQ TCOBCL# BGC SGCOQC -CIJ?O?QGML GPQ

K?LRCJJ DCPQWRJCECL%


)*

!

"

#

$

%

&

Dim RW As Long

Dim Punkte(3) As POINTAPI

Const n = 3

Private Sub Form_Paint()

Dim B, H As Long

... ' belegen des Feldes Punkte mit Werten

RW = Polygon(Form1.hdc, Punkte(0), n)

...

FillColor = &HFFC0C0

RW = ExtFloodFill(hdc, B/2, H/5+10, vbBlue, FLOODFILLBORDER)

...

End Sub

Private Sub Form_Resize()

Form_Paint

End Sub

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3.5.2 Funktionen zur Speicher- und Systemverwaltung

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CreateProcess/KLM?FFM ?CH?H H?N?H 7KIR?T$ >?K >;L ;FL 7;K;G?M?K W<?KA?<?H? 7KIAK;GG;NL@WBKM&

ExitProcess -??H>?M ?CH?H 7KIR?T&

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Sleep .;L 7KIAK;GG "<RP& 9BK?;># PCK> @WK ?CHCA? 8?ENH>?H ;HA?B;FM?H&

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LoadImage 5[CR DHMD 3L@FD$# -SPQNP$ NCDP ,HRL@O$:DQQNSPBD%

LoadResource 5[CR CHD @MFDFDADMD :DQQNSPBD HM CDM ;ODHBGDP%

UpdateResource5\QBGR NCDP DPQDRXR DHMD :DQQNSPBD HM DHMDL @SQE]GPA@PDM 9PNFP@LL NCDP E]FRDHMD GHMXS%

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GetComputerName 1HAR CDM -NLOSRDPM@LDM CDQ @JRSDKKDM ;WQRDLQ XSP]BJ%

GetSystemMetrics 1HAR TDPQBGHDCDMD ;WQRDL$1P\ZDM@MF@ADM XSP]BJ%

GetUserName 1HAR CDM ,DMSRXDPM@LDM CDQ @JRSDKKDM <GPD@CQ XSP]BJ%

GetWindowsDirectory 1HAR CDM 9E@C CDQ ?HMCNUQ$>DPXDHBGMHQQDQ XSP]BJ%

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DecryptFile >DPQBGK]QQDKR CHD @MFDFDADMD .@RDH%

EncryptFIle /MRQBGK]QQDKR CHD @MFDFDADMD .@RDH%

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GetVolumeInformation5HDEDPR 3MENPL@RHNMDM ]ADP C@Q .@RDHQWQRDL SMC CDM ;ODHBGDPOK@RX CDQ @MFD$FDADMDM ?SPXDKTDPXDHBGMHQQDQ%

3.5.3 Fenster- und Mausfunktionen

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EnumWindows1HAR @KKD <NO$5DTDK$0DMQRDP XSP]BJ# UNADH E]P IDCDQ 0DMQRDP CDP :DHGD M@BG DHMD-@KKA@BJ$0SMJRHNM @SEFDPSEDM UHPC%

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Private Declare Function GetWindowsDirectory Lib "kernel32" _

Alias "GetWindowsDirectoryA" (ByVal lpBuffer As String, _

ByVal nSize As Long) As Long

Private Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" _

(ByVal lpBuffer As String, nSize As Long) As Long

Private Declare Function GetComputerName Lib "kernel32" _

Alias "GetComputerNameA" (ByVal lpBuffer As String, _

nSize As Long) As Long

Private Declare Function Lib "kernel32" Alias "GetVersionExA" _

(lpVersionInformation As OSVERSIONINFO) As Long

Private Type OSVERSIONINFO

dwOSVersionInfoSize As Long

dwMajorVersion As Long

dwMinorVersion As Long

dwBuildNumber As Long

dwPlatformId As Long

szCSDVersion As String * 128 'Maintenance string for PSS usage

End Type

Const VER_PLATFORM_WIN32s = 0 'für Windows 3.1

Const VER_PLATFORM_WIN32_WINDOWS = 1 'für Windows 95 oder 98

Const VER_PLATFORM_WIN32_NT = 2 'für Windows NT


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Private Sub Form_Load()

Dim S1 As String * 128, S2 As String * 128, S3 As String * 128

Dim n1, n2, n3 As Long

Dim info As OSVERSIONINFO

S1 = Space(128)

S2 = Space(128)

S3 = Space(128)

n1 = 148

n2 = 148

n3 = 148

GetWindowsDirectory S1, n1

GetUserName S2, n2

GetComputerName S3, n3

WinDir.Text = VB_ZK(S1)

UserName.Text = VB_ZK(S2)

CompName.Text = VB_ZK(S3)

info.dwOSVersionInfoSize = 148

info.szCSDVersion = Space(128)

GetVersionEx info

If info.dwPlatformId = VER_PLATFORM_WIN32s Then

BS.Text = "Windows 3.1"

ElseIf info.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS Then

If info.dwMinorVersion = 0 Then '

BS.Text = "Windows 95"

Else

BS.Text = "Windows 98"

End If

Else

BS.Text = "Windows NT"

End If

With info

Vers.Text = .dwMajorVersion & "." & .dwMinorVersion

Build.Text = .dwBuildNumber

Zus.Text = VB_ZK(.szCSDVersion)

End With

End Sub

' Nullterminierte Zeichenkette in eine Visual-Basic-Zeichenkette umwandeln

Public Function VB_ZK(ZK$) As String

Dim Pos_0&

Pos_0 = InStr(ZK, Chr(0)) '0 suchen

If Pos_0 = 0 Then

VB_ZK = ""

Else

VB_ZK = Left(ZK, Pos_0 - 1) 'die Zeichen links des 0-Zeichens zurückgeben

End If

End Function


)(

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3.6 Übung

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Notizen

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