On 6/1/21 10:27 PM, Jactry Zeng wrote:
On 6/1/21 9:22 PM, Jiajin Cui wrote:

 
     twain_autodetect();
 
+    if (!IsWindow(parent))
+        parent = *(HWND*)DSM_parent;
+

If this is true, you would need to remove the following check.
Sorry, please ignore this comment.
And I think attaching some tests to verify it won't hurt.