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This method reports the current cooperative-level status of the DirectDraw device for a windowed or full-screen application.
HRESULT TestCooperativeLevel(void);
Parameters
None.
Return Values
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_NOEXCLUSIVEMODE |
| DDERR_WRONGMODE |
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
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Ddraw.h.
Link Library: Ddraw.lib.
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