1 files changed, 72 insertions, 0 deletions
diff --git a/messages_windows.go b/messages_windows.go
new file mode 100644
index 0000000..e74b9fa
--- /dev/null
+++ b/messages_windows.go
@@ -0,0 +1,72 @@
+// 9 february 2014
+package main
+
+import (
+//	"syscall"
+	"unsafe"
+)
+
+// SendMessage constants.
+const (
+	HWND_BROADCAST = HWND(0xFFFF)
+)
+
+type MSG struct {
+	Hwnd	HWND
+	Message	uint32
+	WParam	WPARAM
+	LParam	LPARAM
+	Time		uint32
+	Pt		POINT
+}
+
+var (
+	dispatchMessage = user32.NewProc("DispatchMessageW")
+	getMessage = user32.NewProc("GetMessageW")
+	postQuitMessage = user32.NewProc("PostQuitMessage")
+	sendMessage = user32.NewProc("SendMessageW")
+	translateMessage = user32.NewProc("TranslateMessage")
+)
+
+// TODO handle errors
+func DispatchMessage(lpmsg *MSG) (result LRESULT, err error) {
+	r1, _, _ := dispatchMessage.Call(uintptr(unsafe.Pointer(lpmsg)))
+	return LRESULT(r1), nil
+}
+
+var getMessageFail = -1		// because Go doesn't let me
+
+func GetMessage(hWnd HWND, wMsgFilterMin uint32, wMsgFilterMax uint32) (lpMsg *MSG, quit bool, err error) {
+	lpMsg = new(MSG)
+	r1, _, err := getMessage.Call(
+		uintptr(unsafe.Pointer(lpMsg)),
+		uintptr(hWnd),
+		uintptr(wMsgFilterMin),
+		uintptr(wMsgFilterMax))
+	if r1 == uintptr(getMessageFail) {		// failure
+		return nil, false, err
+	}
+	return lpMsg, r1 == 0, nil
+}
+
+// TODO handle errors
+func PostQuitMessage(nExitCode int) (err error) {
+	postQuitMessage.Call(uintptr(nExitCode))
+	return nil
+}
+
+// TODO handle errors
+func SendMessage(hWnd HWND, Msg uint32, wParam WPARAM, lParam LPARAM) (result LRESULT, err error) {
+	r1, _, _ := sendMessage.Call(
+		uintptr(hWnd),
+		uintptr(Msg),
+		uintptr(wParam),
+		uintptr(lParam))
+	return LRESULT(r1), nil
+}
+
+// TODO handle errors
+func TranslateMessage(lpMsg *MSG) (translated bool, err error) {
+	r1, _, _ := translateMessage.Call(uintptr(unsafe.Pointer(lpMsg)))
+	return r1 != 0, nil
+}