diff --git a/Docs/src/build.bat b/Docs/src/build.bat
index 12c245c5..7445b1aa 100644
--- a/Docs/src/build.bat
+++ b/Docs/src/build.bat
@@ -1,4 +1,4 @@
-bin\halibut.exe config.but intro.but usage.but script.but functions.but callback.but var.but labels.but pages.but attributes.but compilerflags.but sections.but usection.but basic.but registry.but generalpurpose.but flowcontrol.but file.but misc.but string.but stack.but int.but reboot.but log.but sec.but ui.but langs.but plugin.but compiler.but defines.but history.but modernui.but usefulfunc.but credits.but license.but
+bin\halibut.exe config.but intro.but usage.but script.but functions.but callback.but var.but labels.but pages.but attributes.but compilerflags.but sections.but usection.but basic.but registry.but generalpurpose.but flowcontrol.but file.but misc.but string.but stack.but int.but reboot.but log.but sec.but ui.but langs.but plugin.but compiler.but defines.but modernui.but usefulfunc.but history.but credits.but license.but
 @copy Contents.html index.html
 @copy index.html IndexPage.html
 @copy *.html ..\\
diff --git a/Docs/src/ui.but b/Docs/src/ui.but
index b279d157..2e65a8d7 100644
--- a/Docs/src/ui.but
+++ b/Docs/src/ui.but
@@ -73,3 +73,15 @@ Sets mode at which commands print their status. None has commands be quiet, list
 \c hwnd color
 
 Sets a background color for a static control. Use GetDlgItem to get the handle (HWND) of the static control.
+
+\S2{setwindowlong} SetWindowLong
+
+\c hwnd index new_long
+
+Same as \W{http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/windowing/windowclasses/windowclassreference/windowclassfunctions/setwindowlong.asp}{Windows SetWindowLong}.
+
+\S2{showwindow} ShowWindow
+
+\c hwnd show_state
+
+Sets the visibilty of a window. Possible show_states are the same as \W{http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/windowing/windows/windowreference/windowfunctions/showwindow.asp}{Widnows ShowWindow} function. SW_* are defined in \W{../Examples/WinMessages.nsh}{Examples\\WinMessages.nsh}.
\ No newline at end of file