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Man Pages
XmSetFontUnits(3) FreeBSD Library Functions Manual XmSetFontUnits(3)

XmSetFontUnits — A function that sets the font unit value for a display

#include <Xm/Xm.h>
void XmSetFontUnits(
Display * display,
int h_value,
int v_value);

XmSetFontUnits provides an external function to initialize font unit values. Applications may want to specify resolution-independent data based on a global font size. This function must be called before any widgets with resolution-independent data are created. See the XmNunitType resource description in the reference pages for XmGadget, XmManager, and XmPrimitive for more information on resolution independence.
This function sets the font units for all screens on the display.
NOTE: XmSetFontUnits is obsolete and exists for compatibility with previous releases. Instead of using this function, provide initial values or call XtSetValues for the XmScreen resources XmNhorizontalFontUnit and XmNverticalFontUnit.
display
Defines the display for which this font unit value is to be applied.
h_value
Specifies the value to be used for horizontal units in the conversion calculations.
h_value
Specifies the value to be used for vertical units in the conversion calculations.

XmConvertUnits(3), XmSetFontUnit(3), XmGadget(3), XmManager(3), XmPrimitive(3), and XmScreen(3).

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