diff --git a/user32.go b/user32.go
index 3207c068..e388cbec 100644
--- a/user32.go
+++ b/user32.go
@@ -1648,6 +1648,7 @@ var (
 	updateWindow               uintptr
 	windowFromDC               uintptr
 	windowFromPoint            uintptr
+	setLayeredWindowAttributes uintptr
 )
 
 func init() {
@@ -1779,6 +1780,7 @@ func init() {
 	updateWindow = MustGetProcAddress(libuser32, "UpdateWindow")
 	windowFromDC = MustGetProcAddress(libuser32, "WindowFromDC")
 	windowFromPoint = MustGetProcAddress(libuser32, "WindowFromPoint")
+	setLayeredWindowAttributes = MustGetProcAddress(libuser32, "SetLayeredWindowAttributes")
 }
 
 func AddClipboardFormatListener(hwnd HWND) bool {
@@ -2899,3 +2901,15 @@ func WindowFromPoint(Point POINT) HWND {
 
 	return HWND(ret)
 }
+
+func SetLayeredWindowAttributes(hwnd HWND, crKey COLORREF, bAlpha byte, dwFlags uint32) bool {
+	ret, _, _ := syscall.Syscall6(setLayeredWindowAttributes, 4,
+		uintptr(hwnd),
+		uintptr(crKey),
+		uintptr(bAlpha),
+		uintptr(dwFlags),
+		0,
+		0)
+
+	return ret != 0
+}