[06/18] comctl32: TaskDialog - Implement main and content text controls

[Joachim Priesner]

Glad to see that someone is finally implementing this properly :)

> @@ -276,7 +324,33 @@ HRESULT WINAPI TaskDialogIndirect(const TASKDIALOGCONFIG *pTaskConfig, int *pnBu
>  
>      /* Start creating controls */
>  
> -    controls_add(controls, IDOK, class_button, text_ok, WS_CHILD | WS_VISIBLE, 105, 85, 40, 10);
> +    if(!STR_EMPTY(pTaskConfig->pszMainInstruction))
> +    {
> +        RECT rect;
> +
> +        SelectObject(dc_dummy, font_main);
> +        rect = text_get_rect(dc_dummy, pTaskConfig->pszMainInstruction, dialog_width);
> +
> +        controls_add(controls, ID_TEXTMAIN, class_static, pTaskConfig->pszMainInstruction,
> +                     WS_CHILD | WS_VISIBLE, 5, dialog_height + 5, rect.right, rect.bottom);

The psz* parameters (e.g. pszMainInstruction) can contain a resource ID instead of a string. (Passing an invalid ID just results in an empty string.)

Right now passing something that is not a string crashes the dialog, which probably should not happen. To get the string if a resource ID has been passed you can use something like

+/* Fills "result" with a pointer to the string specified by "text", which may be a resource identifier. */
+static HRESULT TASKDIALOG_GetText(const WCHAR *text, HINSTANCE instance, const WCHAR **result)
+{
+    if (IS_INTRESOURCE(text))
+    {
+        SetLastError(S_OK);
+        LoadStringW(instance, LOWORD(text), (LPWSTR)result, 0);
+        return HRESULT_FROM_WIN32(GetLastError());
+    }
+    else
+    {
+        *result = text;
+        return S_OK;
+    }
+}