Any program should conform the Windows settings. When using menu or message boxes, that is automatic. But if a want to use the same font is own drawn objects, I need to get the font description.
I have found a solution in the registry. HKCU\Control Panel\Desktop\WindowMetrics\ contains binary data for each font, and this data corresponds to the LOGFONTW structure. Do you think it is safe?
Any way, I now use another method: the SystemParametersInfo() function. For older Windows versions, the SPI_GETNONCLIENTMETRICS structure is smaller (read carefully the Microsoft documentation!). One should check the Windows version at runtime (not at compile time). As I am not sure of the exact version numbers, I try both cases :
void defaultFontGet(LOGFONT *defFont) /* get the Windows menu font */
{
NONCLIENTMETRICS ncm ;
LOGFONT *fnt = &(ncm.lfMenuFont) ;
ncm.cbSize = sizeof(ncm) ;
int e = SystemParametersInfo(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0) ;
if (e == 0) /* for old Windows version - cf Microsoft documentation */
{
ncm.cbSize -= 4 ;
e = SystemParametersInfo(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0) ;
}
if (e == 0) /* if something is still wrong */
{
memset((void*) fnt, 0, sizeof(LOGFONT)) ; /* defaults values */
fnt->lfHeight = - 11 ;
fnt->lfCharSet = DEFAULT_CHARSET ;
fnt->lfWeight = FW_NORMAL ;
strcpy(fnt->lfFaceName, "Tahoma") ;
}
memcpy(defFont, fnt, sizeof(LOGFONT)) ;
}
