GpiQueryMarkerSet
This function returns the current value of the marker-set attribute, as set by the GpiSetMarkerSet function.
Syntax
GpiQueryMarkerSet(hps)
Parameters
- hps (HPS) - input
- Presentation-space handle.
Return Value
- lSet (LONG) - returns
- Marker-set local identifier.
- LCID_DEFAULT
- Default
- >0
- Marker-set local identifier
- LCID_ERROR
- Error.
Remarks
This function is invalid when the drawing mode (see GpiSetDrawingMode) is set to retain.
Errors
Possible returns from WinGetLastError:
- PMERR_INV_HPS (0x207F)
- An invalid presentation-space handle was specified.
- PMERR_PS_BUSY (0x20F4)
- An attempt was made to access the presentation space from more than one thread simultaneously.
- PMERR_INV_IN_RETAIN_MODE (0x208C)
- An attempt was made to issue a function (for example, query) that is invalid when the actual drawing mode is not draw or draw-and-retain.
- PMERR_INV_DC_TYPE (0x2060)
- An invalid type parameter was specified with DevOpenDC, or a function was issued that is invalid for a OD_METAFILE_NOQUERY device context.
Example Code
#define INCL_GPIPRIMITIVES /* Or use INCL_GPI, INCL_PM, */ #include <os2.h> HPS hps; /* Presentation-space handle. */ LONG lSet; /* Marker-set local identifier. */ lSet = GpiQueryMarkerSet(hps);
This example uses GpiQueryMarkerSet to return the current marker-set attribute after setting the draw mode to DRAW.
#define INCL_GPIPRIMITIVES /* Primitive functions */ #define INCL_GPICONTROL /* Control functions */ #include <os2.h> HPS hps; /* Presentation-space handle */ LONG lSet; /* marker-set local identifier */ if (GpiSetDrawingMode(hps, DM_DRAW) == TRUE) lSet = GpiQueryMarkerSet(hps);