diff --git a/Win32/charedit/dlogtool.cpp b/Win32/charedit/dlogtool.cpp
index 5e54e824..0e484925 100644
--- a/Win32/charedit/dlogtool.cpp
+++ b/Win32/charedit/dlogtool.cpp
@@ -157,7 +157,7 @@ short button_ul_y[15] = {0,0,132,23,46, 69,46,69,36,36, 36,23,92,92,0};
 short button_width[15] = {23,63,102,16,63, 63,63,63,6,14, 14,63,63,63,30};
 short button_height[15] = {23,23,23,13,23, 23,23,23,6,10,10,23,40,40,30};
 
-BOOL CALLBACK dummy_dialog_proc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);
+INT_PTR CALLBACK dummy_dialog_proc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);
 LRESULT CALLBACK fresh_edit_proc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
 
 DLGPROC d_proc;