Big fonts and file operation on Windows NT

[Chris Boss]

Michael;

When you calculate the size for a Font you can convert a
"point" size into the Height value (first parameter) for the
CreateFont API function and also check the system for the
Systemwide Font setting (small fonts/large fonts) in the
calculation using the code below :

' -----------------------------
' PointSize&   -   is the Point size of the font
' SF&    -   System wide font size factor
' -----------------------------
hDC = GetDC(%HWND_DESKTOP)
SF&=GetDeviceCaps(hDC, %LOGPIXELSY)
ReleaseDC %HWND_DESKTOP, hDC
' -----------------------------
' FHeight& will be used as first paramter (height)
' in the CreateFont API function
FHeight&=-MulDiv(PointSize&, SF&, 72)

The code above is the "official" Microsoft suggested method
for calculating a Fonts height. This will allow your fonts to
autoscale based on the end users font setting (small/large fonts).



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[Tom Hanlin]

On (2), the most likely guess is that you're running on an NT account that doesn't have file read/write privileges on the drive you're using. Don't forget to check the ERR and ERRAPI results after the OPEN or MKDIR operations to see what they indicate.

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Tom Hanlin
PowerBASIC Staff

[Michael Rosner]

Hello.
I have got 2 questions.

1. How can I see whether a user has choosen big fonts for his
screen configuration.
2. Although my app generally works under Windows NT/2000 it
doesn't allow any file operations like OPEN or MKDIR.
Whats wrong ???

Thanks..Michael


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