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IDirectDraw::TestCooperativeLevel

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method reports the current cooperative-level status of the DirectDraw device for a windowed or full-screen application.

Syntax

HRESULT TestCooperativeLevel(void); 

Parameters

None.

Return Value

If the method succeeds, the return value is DD_OK, indicating that the calling application can continue executing.

If the method fails, the return value may be one of the following error values:

DDERR_INVALIDOBJECT

DDERR_EXCLUSIVEMODEALREADYSET

DDERR_WRONGMODE

For more information on these error codes see DirectDraw Return Values.

Remarks

This method is particularly useful to applications that use the WM_ACTIVATE and WM_DISPLAYCHANGE system messages as a notification to restore surfaces or re-create DirectDraw objects.

The DD_OK return value always indicates that the application can continue execution, but the failure codes are interpreted differently depending on the cooperative-level that the application uses.

Requirements

Header ddraw.h
Library ddraw.lib
Windows Embedded CE Windows Embedded CE 6.0 and later
Windows Mobile Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later