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TDx_Draw_Library v2.00 Component Reference [ TDx_Draw::TestCooperativeLevel() ]     [ next: WaitForVerticalBlank() ]     [ prev: StartModeTest() ] public:      virtual HRESULT __fastcall TestCooperativeLevel();    TDX_DRAW::TESTCOOPERATIVELEVEL()   [ component method ] Description The TDx_Draw::TestCooperativeLevel method is used to determine if a program can restore/use its surfaces. A fullscreen exclusive application will receive DDERR_NOEXCLUSIVEMODE if ALT-TAB is pressed. A minimised normal mode application will receive DDERR_EXCLUSIVEMODEALREADYSET if another application has exclusive mode. TDx_Draw::TestCooperativeLevel() should be used until DD_OK is returned, before any operations are performed. Use TApplication.ProcessMessages() to reduce CPU usage during the TDx_Draw::TestCooperativeLevel() loop. If the method call fails, the OnError event will be triggered with one of the following values: DDERR_INVALIDOBJECT DDERR_EXCLUSIVEMODEALREADYSET DDERR_NOEXCLUSIVEMODE DDERR_WRONGMODE See Also TDx_Draw Top If you would like to submit additions or improvements to this page, click: darren_john_dwyer@hotmail.com.

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