EnumWindowsProc callback function
Applies to: desktop apps only
An application-defined callback function used with the EnumWindows or EnumDesktopWindows function. It receives top-level window handles. The WNDENUMPROC type defines a pointer to this callback function. EnumWindowsProc is a placeholder for the application-defined function name.
Syntax
BOOL CALLBACK EnumWindowsProc( __in HWND hwnd, __in LPARAM lParam );
Parameters
- hwnd [in]
-
A handle to a top-level window.
- lParam [in]
-
The application-defined value given in EnumWindows or EnumDesktopWindows.
Return value
To continue enumeration, the callback function must return TRUE; to stop enumeration, it must return FALSE.
Remarks
An application must register this callback function by passing its address to EnumWindows or EnumDesktopWindows.
Requirements
|
Minimum supported client | Windows 2000 Professional |
|---|---|
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Minimum supported server | Windows 2000 Server |
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Header |
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See also
- Reference
- EnumWindows
- Conceptual
- Windows
- Other Resources
- EnumDesktopWindows
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Build date: 2/3/2012
In example (32bit) this does not work:
nProc FindWindow.EnumWindowsProc(long wnd,lp){
string s=space(260)
long r=GetWindowText(wnd,s,260)
casenot r : return true
MessageBox(,s,,)
return true
}
But this works fine: nProc FindWindow.EnumWindowsProc(long wnd,lp){
PushAll
string s=space(260)
long r=GetWindowText(wnd,s,260)
ifnot r {
PopAll
return true
}
MessageBox(,s,,)
PopAll
return true
}
