void XtGetApplicationNameAndClass(Display* display, String* name_return, String* class_return);
Specifies an open display connection that has been initialized with XtDisplayInitialize.
Returns the application name.
Returns the application class.
XtGetApplicationNameAndClass returns the application name and class passed to XtDisplayInitialize for the specified display. If the display was never initialized or has been closed, the result is undefined. The returned strings are owned by the Intrinsics and must not be modified or freed by the caller.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface