searchcontrols.txt

一部分关于VB编程的小技巧

Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hWnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As Long, ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long
Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hWnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long

Const WM_GETTEXT = &HD
Const WM_GETTEXTLENGTH = &HE


Public Function EnumChildProc(ByVal hWnd As Long, ByVal lParam As Long) As Long
 Dim sSave$, sClassName$, sWindowText$, iLength As Long
 
 'Get window class name
 sClassName = String(255, Chr(0))
 GetClassName hWnd, sClassName, 255
 sClassName = Left(sClassName, InStr(1, sClassName, Chr(0), vbTextCompare) - 1)
    
 'Get window text
 sWindowText = String(255, Chr(0)) 'get length of buffer from getwindowtextlength
 GetWindowText hWnd, sWindowText, 255
 sWindowText = Left(sWindowText, InStr(1, sWindowText, Chr(0), vbTextCompare) - 1)
    
 Debug.Print hwnd

 'continue enumeration
 EnumChildProc = 1
End Function