diff --git a/winapi/user32.go b/winapi/user32.go
index b45e89c..a240cdd 100644
--- a/winapi/user32.go
+++ b/winapi/user32.go
@@ -18,11 +18,13 @@ const (
 var libuser32 *windows.LazyDLL
 var findWindowEx *windows.LazyProc
 var getNextWindow *windows.LazyProc
+var flashWindow *windows.LazyProc
 
 func init() {
 	libuser32 = windows.NewLazySystemDLL("user32.dll")
 	findWindowEx = libuser32.NewProc("FindWindowExW")
-	getNextWindow = libuser32.NewProc("GetNextWindow ")
+	getNextWindow = libuser32.NewProc("GetNextWindow")
+	flashWindow = libuser32.NewProc("FlashWindow")
 }
 
 //FindWindowEx user32 API FindWindowEx
@@ -41,3 +43,8 @@ func GetNextWindow(hWnd win.HWND, wCmd uintptr) win.HWND {
 	ret, _, _ := getNextWindow.Call(uintptr(hWnd), wCmd)
 	return win.HWND(ret)
 }
+
+func FlashWindow(hWnd win.HWND, bInvert int) int {
+	ret, _, _ := flashWindow.Call(uintptr(hWnd), uintptr(bInvert))
+	return int(ret)
+}