Return
codes.
This function returns an integer (lVisible) indicating the visibility of
the point:
PVIS_ERROR
PVIS_INVISIBLE
PVIS_VISIBLE
Possible
Errors Detected: When an error is detected, the handling routine must
call WinSetErrorInfo to post the condition. Error codes for conditions that
the handling routine is expected to check include:
PMERR_COORDINATE_OVERFLOW PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_HDC_BUSY
PMERR_INV_COORD_SPACE
PMERR_INV_COORDINATE
PMERR_INV_HDC
PMERR_INV_LENGTH_OR_COUNT
PMERR_INV_RECT
Refer to the "Error Explanations"
section in the Presentation Manager Programming Reference for further
explanation.