_WinAPI_GetObject

[WideBoyDixon 11]

Using _WinAPI_GetObject() from WinAPI.au3 always reports an error for me when I'm trying, for example, to retrieve the logical font structure for a font handle. Snippet:

Local $tFONT = DllStructCreate($tagLOGFONT)
    Local $hDC = _WinAPI_GetDC($hGUI)
    Local $hFont = _SendMessage($hGUI, $WM_GETFONT, 0)
    _WinAPI_GetObject($hFont, DllStructGetSize($tFONT), DllStructGetPtr($tFONT))
    DllStructSetData($tFONT, "FaceName", "Courier New")

This gives me a message box error on the _WinAPI_GetObject() call because the return value is non-zero. However, the return value as I understand it is the number of bytes copied in to the structure so this check is a little overzealous. Or have I missed something?

WBD

[Authenticity 12]

I think _WinAPI_GetObject gives an error if the return value is 0. Try to call GetObject yourself to see if the return is not zero.

[WideBoyDixon 11]

Func _WinAPI_GetObject($hObject, $iSize, $pObject)
    Local $aResult

    $aResult = DllCall("GDI32.dll", "int", "GetObject", "int", $hObject, "int", $iSize, "ptr", $pObject)
    _WinAPI_Check("_WinAPI_GetObject", ($aResult[0] = 0), 0, True)
    Return $aResult[0]
EndFunc   ;==>_WinAPI_GetObject

So it raises an error if $aResult[0] = 0 which is never true. When I do the DllCall myself and basically ignore the return value then everything works as I would like it to. Is this a bug in _WinAPI_GetObject()?

WBD

[Authenticity 12]

Did you check if $hFont is not null? According to MSDN WM_GETFONT The return value is the handle of the font used by the control, or NULL if the control is using the system font.

[WideBoyDixon 11]

Doh! Thanks for pointing out my stupid mistake