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NtGdiDdGetScanLine function

[This function is subject to change with each operating system revision. Instead, use the Microsoft DirectDraw and Microsoft Direct3DAPIs; these APIs insulate applications from such operating system changes, and hide many other difficulties involved in interacting directly with display drivers.]

Returns the number of the current physical scan line.

Syntax


DWORD APIENTRY NtGdiDdGetScanLine(
  _In_     HANDLE hDirectDraw,
  _Inout_  PDD_GETSCANLINEDATA puGetScanLineData
);

Parameters

hDirectDraw [in]

Handle to a DD_DIRECTDRAW_GLOBAL structure that represents the driver.

puGetScanLineData [in, out]

Pointer to a DD_GETSCANLINEDATA structure in which the driver returns the number of the current scan line.

Return value

NtGdiDdGetScanLine returns one of the following callback codes.

Return codeDescription
DDHAL_DRIVER_HANDLED

The driver has performed the operation and returned a valid return code for that operation. If this code is DD_OK, DirectDraw or Direct3D proceeds with the function. Otherwise, DirectDraw or Direct3D returns the error code provided by the driver and aborts the function.

DDHAL_DRIVER_NOTHANDLED

The driver has no comment on the requested operation. If the driver is required to have implemented a particular callback, DirectDraw or Direct3D reports an error condition. Otherwise, DirectDraw or Direct3D handles the operation as if the driver callback had not been defined by executing the DirectDraw or Direct3D device-independent implementation.

 

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Ntgdi.h

See also

Graphics Low Level Client Support

 

 

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