Enumerating Window Properties (Windows CE 5.0)
To enumerate all of the properties for a window, call the EnumPropsEx function. EnumPropsEx passes the property entries to an application-defined callback function that you specify in the lpEnumFunc parameter when you call EnumPropsEx. For information about the callback function and a definition of the callback function prototype, see PropEnumProcEx. PropEnumProcEx is a placeholder for the application-defined function name.
The following code example shows how to use the EnumPropsEx function to list the string identifiers of the window properties for the window identified by the application-defined hwndSubclass variable. This function relies on the application-defined WinPropProc callback function to display the strings in the client area of the window.
EnumPropsEx(hwndSubclass, WinPropProc, NULL);
// WinPropProc is an application-defined callback function
// that lists a window property.
BOOL CALLBACK WinPropProc(
HWND hwndSubclass, // Handle to window with a property
LPCSTR lpszString, // Property string or atom
HANDLE hData, // Data handle
ULONG_PTR dwData) // Application-defined data, set to NULL in this
// example
{
static int nProp = 1; // Property counter
TCHAR tchBuffer[BUFFER]; // Expanded-string buffer
int nSize; // Size of string in buffer
HDC hdc; // Device-context handle
HRESULT hr;
hdc = GetDC(hwndSubclass);
// Display window property string in client area.
hr = StringCchPrintf(tchBuffer, BUFFER, TEXT("WinProp %d: %s"),
nProp++, lpszString);
ExtTextOut(hdc, 10, nProp * 20, 0, NULL, tchBuffer, nSize, NULL);
ReleaseDC(hwndSubclass, hdc);
return TRUE;
}
See Also
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