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-rw-r--r--win/ttkWinMonitor.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/win/ttkWinMonitor.c b/win/ttkWinMonitor.c
index fda8304..25c9c0c 100644
--- a/win/ttkWinMonitor.c
+++ b/win/ttkWinMonitor.c
@@ -92,7 +92,7 @@ CreateThemeMonitorWindow(HINSTANCE hinst, Tcl_Interp *interp)
hwnd = CreateWindow( name, title, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hinst, NULL );
- SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG)interp);
+ SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)interp);
ShowWindow(hwnd, SW_HIDE);
UpdateWindow(hwnd);
}