GreQueryFontAttributes
From EDM2
GreQueryFontAttributes returns the metrics of the current font at the location addressed by pfmMetrics.
This function is supported by the graphics engine.
Contents
Syntax
GreQueryFontAttributes(hdc, cbMetrics, pfmMetrics, pInstance, lFunction);
Parameters
- hdc (HDC) - input
- Device context handle.
- cbMetrics (LONG) - input
- Size in bytes of the font metrics buffer.
- pfmMetrics (PFONTMETRICS) - input
- Pointer.
- Pointer to font metric block where the information is to be returned.
- pInstance (PVOID) - input
- Pointer to instance data.
- lFunction (ULONG) - input
- High-order WORD=flags; low-order WORD=NGreQueryFontAttributes.
Returns
- 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_COORDINATE_OVERFLOW
- PMERR_DEV_FUNC_NOT_INSTALLED
- PMERR_HDC_BUSY
- PMERR_INV_COORD_SPACE
- PMERR_INV_HDC
- PMERR_INV_LENGTH_OR_COUNT
- PMERR_INV_SETID
- Refer to the "Error Explanations" section of the Presentation Manager Programming Reference for further explanation.
Sample
#define INCL_GRE_FONTS #include <os2.h> HDC hdc; /* Device context handle. */ LONG cbMetrics; /* Size in bytes of the font metrics buffer. */ PFONTMETRICS pfmMetrics; /* Pointer. */ PVOID pInstance; /* Pointer to instance data. */ ULONG lFunction; /* High-order WORD=flags; low-order WORD=NGreQueryFontAttributes. */ BOOL fSuccess; /* Return codes. */ fSuccess = GreQueryFontAttributes(hdc, cbMetrics, pfmMetrics, pInstance, lFunction);