How to hide cursor for the complete window?

[eminemence <mayur_kankanwadi persistent co in>]

Hi All,
I have this simple application which has some buttons and some custom
controls.
I want to hide the cursor for the complete application.
I have seen this code in the posts here:
###################################################
        char invisible_cursor_bits[] = { 0x0 };
        GdkCursor* cursor;
        GdkBitmap *empty_bitmap;
        GdkColor color = { 0, 0, 0, 0 };
        empty_bitmap = gdk_bitmap_create_from_data (gTopLevelWindow->window,
                                                 invisible_cursor_bits,
                                                 1, 1);
        cursor = gdk_cursor_new_from_pixmap (empty_bitmap, empty_bitmap, &color,
&color, 0, 0);
        gdk_window_set_cursor(gTopLevelWindow->window, cursor);
        gdk_cursor_destroy(cursor);
//      gdk_window_set_cursor(scrolledWindow->window, cursor);
###################################################
Now I have used this code to hide the cursor,but it does this only on a
button click and reappears after the focus moves away from the buttons to
other custom controls.
How can I hide/show for the complete cursor?
Any other API or call to do the same?
Thanks.
--eminemence.
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