I am trying to use XGetWindowAttributes and it is just returning me a "bad request" error. I have tried everything including all the examples I found online, but nothing works. I am really looking to gather the current geometry information of a window, and also the current icon location, so that I can blow the window away and execl a new one exactly where the old one was.

Here is a test program I have written. In the PushNotify function I have replaced top_level with panel and wid,in all combinations, but it still doesn't work.

// standard include files
#include
#include

// Motif include files
#include
#include
#include
#include

// global variables
Widget top_level; // top level widget
Widget panel; // panel

// callback
void PushNotify( Widget wid, caddr_t client_data, caddr_t client_args );

//**************************************************************************
//
// Function: main
//
// Purpose: Initial execution of the test process.
//
//**************************************************************************
int main( int argc, char* argv[] )
{
// local variables
XtAppContext app; // application context
WidgetList childList = NULL; // child widget list

// create top level shell for Motif dialogs
top_level = XtVaAppInitialize( &app, "TopLevel", NULL, 0, &argc, argv,
NULL,
XmNwidth, 150,
XmNheight, 100,
NULL );

// create panel
panel = XtVaCreateWidget( "panel",
xmFormWidgetClass, top_level,
XmNmarginWidth, 0,
XmNmarginHeight, 0,
XmNautoUnmanage, FALSE,
XmNallowOverlap, TRUE,
XmNwidth, 150,
XmNheight, 50,
NULL);
XtManageChild( panel );

// create push button
Widget w = XtVaCreateWidget( "button", xmPushButtonWidgetClass,
panel, NULL );
XtManageChild( w );
XtVaSetValues( w,
XmNx, 20,
XmNy, 50,
NULL );
XtAddCallback( w, XmNactivateCallback, ( XtCallbackProc ) PushNotify,
NULL );

// enter main application loop
XtRealizeWidget( top_level );
XtAppMainLoop( app );
}

void PushNotify( Widget wid, caddr_t client_data, caddr_t client_args )
{
// local variable
XWindowAttributes wa; // window attributes

#if 0
// have also tried this and substituting d/tshell for top_level
Widget dshell;
Widget tshell;
for ( dshell = wid; !XtIsShell( dshell ); dshell = XtParent( dshell ) );
for ( tshell = dshell; !XtIsTopLevelShell( tshell ); tshell = XtParent( tshell ) );
#endif

if ( Success != XGetWindowAttributes( XtDisplay( top_level ),
XtWindow( top_level ), &wa ) )
{
cout << "Failed to get window attributes." << endl;
} // end failed to get window attributes
}