Implement a much more visually appealing, but much more internally

grotty, hack to get around Explorer maximising the config box.

[originally from svn r707]

putty.h

@@ -269,6 +269,7 @@ void random_destroy_seed(void);
 /*
  * Exports from windlg.c.
  */
+int defuse_showwindow(void);
 int do_config (void);
 int do_reconfig (HWND);
 void do_defaults (char *, Config *);

windlg.c

@@ -173,6 +173,14 @@ static int CALLBACK AboutProc (HWND hwnd, UINT msg,
     return 0;
 }
 
+/*
+ * Null dialog procedure.
+ */
+static int CALLBACK NullDlgProc (HWND hwnd, UINT msg,
+                                 WPARAM wParam, LPARAM lParam) {
+    return 0;
+}
+
 /* ----------------------------------------------------------------------
  * Routines to self-manage the controls in a dialog box.
  */
@@ -2297,6 +2305,21 @@ static int CALLBACK ReconfDlgProc (HWND hwnd, UINT msg,
     return GenericMainDlgProc (hwnd, msg, wParam, lParam, 1);
 }
 
+int defuse_showwindow(void) {
+    /*
+     * Work around the fact that the app's first call to ShowWindow
+     * will ignore the default in favour of the shell-provided
+     * setting.
+     */
+    {
+        HWND hwnd;
+        hwnd = CreateDialog (hinst, MAKEINTRESOURCE(IDD_ABOUTBOX),
+                             NULL, NullDlgProc);
+        ShowWindow(hwnd, SW_HIDE);
+        DestroyWindow(hwnd);
+    }
+}
+
 int do_config (void) {
     int ret;
 

window.c

@@ -126,6 +126,10 @@ int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
 
     InitCommonControls();
 
+    /* Ensure a Maximize setting in Explorer doesn't maximise the
+     * config box. */
+    defuse_showwindow();
+
     /*
      * Process the command line.
      */