hdc (HDC) - input

Device context handle.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

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

rc (LONG) - returns

Return codes.

This function returns the process control flags (flProcess), or DCTL_ERROR if an error occurs. The flags returned are:

PCTL_DRAW

Draw flag
PCTL_BOUND
GPI_BOUNDS flag
PCTL_CORRELATE
Correlate flag
PCTL_USERBOUNDS
USER_BOUNDS flag
PCTL_AREA
When set, an area definition is in progress
COM_PATH
When set, a path definition is in progress
Other flags are reserved and should be ignored.

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.