shell32: Implement the ShowGroup() command for Progman DDE.

dlls/shell32/dde.c

@@ -121,6 +121,7 @@ static DWORD PROGMAN_OnExecute(WCHAR *command, int argc, WCHAR **argv)
 {
     static const WCHAR create_groupW[] = {'C','r','e','a','t','e','G','r','o','u','p',0};
     static const WCHAR delete_groupW[] = {'D','e','l','e','t','e','G','r','o','u','p',0};
+    static const WCHAR show_groupW[] = {'S','h','o','w','G','r','o','u','p',0};
 
     if (!strcmpiW(command, create_groupW))
     {
@@ -160,6 +161,20 @@ static DWORD PROGMAN_OnExecute(WCHAR *command, int argc, WCHAR **argv)
 
         if (ret || shfos.fAnyOperationsAborted) return DDE_FNOTPROCESSED;
     }
+    else if (!strcmpiW(command, show_groupW))
+    {
+        WCHAR *path;
+
+        /* Win32 requires the second parameter to be present but seems to
+         * ignore its actual value. */
+        if (argc < 2) return DDE_FNOTPROCESSED;
+
+        path = get_programs_path(argv[0]);
+
+        ShellExecuteW(NULL, NULL, path, NULL, NULL, SW_SHOWNORMAL);
+
+        HeapFree(GetProcessHeap(), 0, path);
+    }
     else
     {
         FIXME("unhandled command %s\n", debugstr_w(command));

dlls/shell32/tests/progman_dde.c

@@ -332,18 +332,12 @@ static void test_progman_dde(DWORD instance, HCONV hConv)
     ok(!check_exists("Group1/f3g1Name.lnk"), "link should not exist\n");
 
     error = dde_execute(instance, hConv, "[ShowGroup(Startup, 0)]");
-    todo_wine {
     ok(error == DMLERR_NO_ERROR, "expected DMLERR_NO_ERROR, got %u\n", error);
-    if (error == DMLERR_NO_ERROR)
-        ok(check_window_exists(StartupTitle), "window not created\n");
-    }
+    ok(check_window_exists(StartupTitle), "window not created\n");
 
     error = dde_execute(instance, hConv, "[ShowGroup(Group1, 0)]");
-    todo_wine {
     ok(error == DMLERR_NO_ERROR, "expected DMLERR_NO_ERROR, got %u\n", error);
-    if (error == DMLERR_NO_ERROR)
-        ok(check_window_exists(Group1Title), "window not created\n");
-    }
+    ok(check_window_exists(Group1Title), "window not created\n");
 
     /* DeleteGroup Test */
     error = dde_execute(instance, hConv, "[DeleteGroup(Group1)]");