https://invisible-island.net/xterm/xtoolkit/
XtStringConversionWarning - issue a conversion warning message
#include <X11/Intrinsic.h>
void XtStringConversionWarning(const char *src, const char *dst_type);
src Specifies the string that could not be converted.
dst_type Specifies the name of the type to which the string could not
be converted.
The XtStringConversionWarning function issues a warning message with
name "conversionError", type "string", class "XtToolkitError", and the
default message string "Cannot convert "src" to type dst_type".
XtStringConversionWarning has been replaced by XtDisplayStringConver-
sionWarning.
XtAppAddConverter(3), XtAppErrorMsg(3t), XtConvert(3), XtDisplayString-
ConversionWarning(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.3.1 XtStringConversionWarning(3)