NtGdiDdSetGammaRamp 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.]

Sets the gamma ramp for the device.

Syntax

BOOL APIENTRY NtGdiDdSetGammaRamp(
  _In_ HANDLE hDirectDraw,
  _In_ HDC    hdc,
  _In_ LPVOID lpGammaRamp
);

Parameters

hDirectDraw [in]

Handle to the kernel-mode driver object for which the ramp is to be set.

hdc [in]

Reserved.

lpGammaRamp [in]

Pointer to an array of DDGAMMARAMP structures.

Return value

The return value is TRUE if the function is successful. Otherwise, it is NULL.

Remarks

It is recommended that applications use the IDirectDrawGammaControl::SetGammaRamp or IDirect3DDevice9::SetGammaRamp methods instead because these methods offer the same functionality independent of the operating system.

Requirements

See also

Graphics Low Level Client Support