Added _windows.go extensions to all the files in preparation for the library writing.

1 files changed, 20 insertions, 0 deletions

diff --git a/painting_windows.go b/painting_windows.go
new file mode 100644
index 0000000..069fd2d
--- /dev/null
+++ b/painting_windows.go
@@ -0,0 +1,20 @@
+// 9 february 2014
+package main
+
+import (
+//	"syscall"
+//	"unsafe"
+)
+
+var (
+	updateWindow = user32.NewProc("UpdateWindow")
+)
+
+// TODO is error handling valid here? MSDN just says zero on failure; syscall.LazyProc.Call() always returns non-nil
+func UpdateWindow(hWnd HWND) (err error) {
+	r1, _, err := updateWindow.Call(uintptr(hWnd))
+	if r1 == 0 {		// failure
+		return err
+	}
+	return nil
+}