GpiQueryCharAngle
This function returns the current value of the character baseline angle.
Syntax
GpiQueryCharAngle(hps, pgradlAngle)
Parameters
- hps (HPS) - input
- Presentation-space handle.
- pgradlAngle (PGRADIENTL) - output
- Baseline angle.
- A point, relative to (0,0), that defines the character baseline angle vector.
- If the character angle is currently set to the default value, (0,0) is returned.
Return Value
- rc (BOOL) - returns
- Success indicator.
- TRUE : Successful completion
- FALSE : Error occurred.
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
This example uses GpiQueryCharAngle to return the current value of the character baseline angle; if successful, it places the x-component in a variable.
#define INCL_GPIPRIMITIVES /* Primitive functions */ #include <os2.h> BOOL fSuccess; /* success indicator */ HPS hps; /* Presentation-space handle */ LONG lxComponent; /* x component of baseline angle */ GRADIENTL pgradlAngle; /* Baseline angle */ fSuccess = GpiQueryCharAngle(hps, &pgradlAngle); if (fSuccess == TRUE) lxComponent = pgradlAngle.x;