diff --git a/sdk-api-src/content/winuser/nf-winuser-registerclassa.md b/sdk-api-src/content/winuser/nf-winuser-registerclassa.md
index 0e9c5eafefbe..fb74003e2115 100644
--- a/sdk-api-src/content/winuser/nf-winuser-registerclassa.md
+++ b/sdk-api-src/content/winuser/nf-winuser-registerclassa.md
@@ -76,7 +76,7 @@ A pointer to a WNDCL
Type: ATOM
-If the function succeeds, the return value is a class atom that uniquely identifies the class being registered. This atom can only be used by the CreateWindow, CreateWindowEx, GetClassInfo, GetClassInfoEx, FindWindow, FindWindowEx, and UnregisterClass functions and the IActiveIMMap::FilterClientWindows method.
+If the function succeeds, the return value is a class atom that uniquely identifies the class being registered. This atom can only be used by the CreateWindow, CreateWindowEx, GetClassInfo, GetClassInfoEx, FindWindow, FindWindowEx, and UnregisterClass functions and the IActiveIMMApp::FilterClientWindows method.
If the function fails, the return value is zero. To get extended error information, call GetLastError.