diff --git a/Docs/src/flowcontrol.but b/Docs/src/flowcontrol.but
index 647effa8..f5dce205 100644
--- a/Docs/src/flowcontrol.but
+++ b/Docs/src/flowcontrol.but
@@ -32,7 +32,7 @@ Gets the address of the current instruction (the GetCurrentAddress) and stores i
 
 \c user_var(output) dialog item_id
 
-Retrieves the handle of a control identified by item_id in the specified dialog box dialog.
+Retrieves the handle of a control identified by item_id in the specified dialog box dialog. If you want to get the handle of a control on the inner dialog, first use FindWindow user_var(output) "#32770" "" $HWNDPARENT to get the handle of the inner dialog.
 
 \H{GetFunctionAddress} GetFunctionAddress