From 9dd52c655916fb62b327cfc5af4e19e9abea2fb9 Mon Sep 17 00:00:00 2001
From: Brian Matzon <brian@matzon.dk>
Date: Mon, 12 Jan 2004 16:28:51 +0000
Subject: [PATCH] assert that Direct Input has been created

---
 src/native/win32/org_lwjgl_input_Mouse.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/native/win32/org_lwjgl_input_Mouse.cpp b/src/native/win32/org_lwjgl_input_Mouse.cpp
index 6d4f5e34..5f86dc51 100644
--- a/src/native/win32/org_lwjgl_input_Mouse.cpp
+++ b/src/native/win32/org_lwjgl_input_Mouse.cpp
@@ -108,6 +108,12 @@ JNIEXPORT jint JNICALL Java_org_lwjgl_input_Mouse_nGetButtonCount(JNIEnv *, jcla
 JNIEXPORT void JNICALL Java_org_lwjgl_input_Mouse_nCreate(JNIEnv *env, jclass clazz) {
 	HRESULT hr;
 
+  // assert that Direct Input has been created
+	if(lpdi == NULL) {
+    throwException(env, "Please create the window before initializing input devices\n");
+    return;
+	} 
+
 	ShowCursor(FALSE);
 	CacheMouseFields(env, clazz);