hdc (HDC) - input

Device context handle.

flMask (ULONG) - input

Only those flags with the corresponding bit in this parameter set are modified.

flProcess (ULONG) - input

Indicates which process-control flags to set.

Process-control flags:

PCTL_DRAW

Has no effect on GreErasePS. If set, drawing primitives should appear on screen. Otherwise, output operations such as GreBitblt, GrePaintRegion, GreSetPel and other drawing primitives are not displayed.
PCTL_BOUND
Set to indicate that GPI_BOUNDS must be accumulated.
PCTL_CORRELATE
Set to indicate that correlation is to be done.
PCTL_USERBOUNDS
When set, indicates that USER_BOUNDS are to be collected for the window manager.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreSetProcessControl.

fSuccess (BOOL) - returns

Return codes.

On completion, the handling routine must return BOOLEAN (fSuccess).

TRUE

Successful
FALSE
Error
Possible Errors Detected: When an error is detected, the graphics engine calls WinSetErrorInfo to post the condition. Reasons for failure of this function include:

PMERR_HDC_BUSY PMERR_INV_HDC

Refer to the "Error Explanations" section of the Presentation Manager Programming Reference for further explanation.

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