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- Description
The TDx_Draw::GetScanLine method will return the number of the scan line currently being drawn.
The scan line number is a zero based integer between 0, the first scan line visible, and a number equal to the number of the last visible scan line plus any additional scan lines contained within the vertical blank. Thus, if the screen resolution is 800 by 600 with 20 scan lines during the vertical blank, the scan line number will range from 0 to 619.
If the method call fails, the OnError event will be triggered with one of the following values:
DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_UNSUPPORTED
DDERR_VERTICALBLANKINPROGRESS
- Parameters
ScanLine
The ScanLine parameter will reference the current scan line number if this method returns successfully.
The value returned by this method will be a zero based integer between 0 and the bottom of the display plus any scan lines from the vertical blanking interval.
- See Also
- Top
TDx_Draw_Library v2.00 Component Reference
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[ TDx_Draw::GetScanLine() ] [ next: GetSurfaceFromDC() ] [ prev: GetMonitorFrequency() ] public:
virtual bool __fastcall GetScanLine( dword* pScanLine );
TDX_DRAW::GETSCANLINE()
[ component method ]
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