GreGetStyleRatio
From EDM2
GreGetStyleRatio stores the style ratio X-direction and Y-direction step values at the location addressed by pRatio.
- Simulation support
- This function is mandatory for display drivers. For other drivers, it is simulated by a handling routine in the graphics engine.
Syntax
GreGetStyleRatio(hdc, pRatio, pInstance, lFunction)
Parameters
- hdc (HDC) - input
- The device context handle.
- pRatio (PBYTE) - input
- A pointer to a style ratio value.
- The style ratio is defined as a 2-byte value. The low-order byte indicates a step in the X-direction, the high-order byte a step in the Y-direction.
- pInstance (PVOID) - input
- A pointer to instance data.
- lFunction (ULONG) - input
- High-order WORD=flags; low-order WORD=NGreGetStyleRatio.
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 handling routine must call WinSetErrorInfo to post the condition. Error codes for conditions that the handling routine is expected to check include:
- PMERR_DEV_FUNC_NOT_INSTALLED
- PMERR_INV_HDC