1 files changed, 18 insertions, 0 deletions
diff --git a/alf/alftoplevel.cpp b/alf/alftoplevel.cpp
index 5cdd686..29e43cb 100644
--- a/alf/alftoplevel.cpp
+++ b/alf/alftoplevel.cpp
@@ -322,6 +322,24 @@ ALF_Toplevel_DefWindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
         if (ret) {
             return ret;
         } else {
+            if (ALF_Compat_IsComCtlV6() && !ALF_Compat_IsVista()) {
+                // HACK! transparent checkbox background for comctl v6 on XP
+                // broken on every other version of windows, but not needed for Vista
+
+                WCHAR c[32] = {0};
+                GetClassNameW((HWND)lparam, c, sizeof(c)/sizeof(c[0]));
+
+                if (!lstrcmpW(c, WC_BUTTONW)) {
+                    RECT rcClient;
+                    GetClientRect((HWND)lparam, &rcClient);
+
+                    ALF_Compat_DrawThemeParentBackground((HWND)lparam, (HDC)wparam, &rcClient);
+                    SetBkColor((HDC)wparam, GetSysColor(COLOR_BTNFACE));
+                    SetTextColor((HDC)wparam, GetSysColor(COLOR_BTNTEXT));
+                    return (LRESULT)GetStockObject(HOLLOW_BRUSH);
+                }
+            }
+
             SetBkColor((HDC)wparam, GetSysColor(COLOR_BTNFACE));
             SetTextColor((HDC)wparam, GetSysColor(COLOR_BTNTEXT));
             return (LRESULT)GetSysColorBrush(COLOR_BTNFACE);