Added a button to the test main window, including click handling.

1 files changed, 11 insertions, 0 deletions

diff --git a/common.go b/common.go
index f4c769e..1996f37 100644
--- a/common.go
+++ b/common.go
@@ -13,6 +13,7 @@ var (
 type HANDLE uintptr
 type HWND HANDLE
 type HBRUSH HANDLE
+type HMENU HANDLE
 
 const (
 	NULL = 0
@@ -25,6 +26,16 @@ type WPARAM uintptr
 type LPARAM uintptr
 type LRESULT uintptr
 
+func (w WPARAM) LOWORD() uint16 {
+	// according to windef.h
+	return uint16(w & 0xFFFF)
+}
+
+func (w WPARAM) HIWORD() uint16 {
+	// according to windef.h
+	return uint16((w >> 16) & 0xFFFF)
+}
+
 // microsoft's header files do this
 func MAKEINTRESOURCE(what uint16) uintptr {
 	return uintptr(what)