diff --git a/app.h b/app.h
index c6b7124..e73f9fc 100644
--- a/app.h
+++ b/app.h
@@ -15,6 +15,8 @@ extern "C" {
 
 
 typedef struct _App {
+	void *window; // HWND pointer; window handle set by main()
+
 	System_Physics  *physics;
 	System_Player   *player;
 	System_Input    *input;
diff --git a/main.cpp b/main.cpp
index c2ba271..482edbe 100644
--- a/main.cpp
+++ b/main.cpp
@@ -29,7 +29,8 @@ int main() {
 	vector_Vector *debugText    = vector_Create(1);
 	bool           debugPressed = false;
 
-	App *app = app_NewApp();
+	App *app    = app_NewApp();
+	app->window = win;
 	while (!app->wantQuit) {
 		if (time_Since(frameCounter).microseconds >= 1000000) { // 1 sec
 			/* Duration d = */ time_Reset(&frameCounter);