diff --git a/core/sys/windows/types.odin b/core/sys/windows/types.odin
index b84af7a64..d79197532 100644
--- a/core/sys/windows/types.odin
+++ b/core/sys/windows/types.odin
@@ -901,6 +901,9 @@ WS_TILEDWINDOW      : UINT : WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKF
 WS_VISIBLE          : UINT : 0x1000_0000
 WS_VSCROLL          : UINT : 0x0020_0000
 
+PBS_SMOOTH   :: 0x01
+PBS_VERTICAL :: 0x04
+
 QS_ALLEVENTS      : UINT : QS_INPUT | QS_POSTMESSAGE | QS_TIMER | QS_PAINT | QS_HOTKEY
 QS_ALLINPUT       : UINT : QS_INPUT | QS_POSTMESSAGE | QS_TIMER | QS_PAINT | QS_HOTKEY | QS_SENDMESSAGE
 QS_ALLPOSTMESSAGE : UINT : 0x0100