implement modality in ALFApplication

1 files changed, 19 insertions, 0 deletions

diff --git a/alf/alf.cpp b/alf/alf.cpp
index 84ba71d..a4abca6 100644
--- a/alf/alf.cpp
+++ b/alf/alf.cpp
@@ -411,3 +411,22 @@ ALF_SetFocus(HWND target)
     else
         SendMessage(target, WM_NEXTDLGCTL, (WPARAM)target, TRUE);
 }
+
+int
+ALF_MessageBox(HWND hwnd, const TCHAR *text, const TCHAR *caption, UINT type)
+{
+    ALFApplication *app = NULL;
+
+    if (GetWindowThreadProcessId(hwnd, NULL) == GetCurrentThreadId())
+        app = ALF_Toplevel_Application(hwnd);
+
+    if (app)
+        ALF_Application_DisableWindowsForModal(app, hwnd);
+
+    int retval = MessageBox(hwnd, text, caption, type);
+
+    if (app)
+        ALF_Application_ReenableWindowsForModal(app, hwnd);
+
+    return retval;
+}