IDirectDraw4::TestCooperativeLevel

  • 项目

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.

 Last updated on Thursday, April 08, 2004

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