Tk_MainWindow(3) Tk Library Procedures Tk_MainWindow(3)
Tk_MainWindow, Tk_GetNumMainWindows - functions for querying main win-
Tcl_Interp *interp (in/out) Interpreter associated with the
A main window is a special kind of toplevel window used as the outer-
most window in an application.
If interp is associated with a Tk application then Tk_MainWindow
returns the application's main window. If there is no Tk application
associated with interp then Tk_MainWindow returns NULL and leaves an
error message in interp->result.
Tk_GetNumMainWindows returns a count of the number of main windows cur-
rently open in the process.
application, main window
Tk 7.0 Tk_MainWindow(3)