Added most of the Windows implementation of ProgressBar. Now to grab the comctl32.dll stuff.

prefsize_windows.go

@@ -53,6 +53,10 @@ var stdDlgSizes = [nctypes]dlgunits{
 		// height is not clearly defined here ("an integral number of items (3 items minimum)") so just use a three-line edit control
 		height:	14 + 10 + 10,
 	},
+	c_progressbar:		dlgunits{
+		width:	237,		// the first reference says 107 also works; TODO decide which to use
+		height:	8,
+	},
 }
 
 var (

sysdata_windows.go

@@ -92,6 +92,11 @@ var classTypes = [nctypes]*classData{
 		selectedIndexErr:	_LB_ERR,
 		addSpaceErr:		_LB_ERRSPACE,
 	},
+	c_progressbar:		&classData{
+		name:			XXXXX,
+		style:			_PBS_SMOOTH | controlstyle,
+		xstyle:			0 | controlxstyle,
+	},
 }
 
 func (s *sysData) addChild(child *sysData) _HMENU {
@@ -501,3 +506,19 @@ func (s *sysData) delete(index int) (err error) {
 	}
 	return nil
 }
+
+func (s *sysData) setProgress(percent int) {
+	ret := make(chan uiret)
+	defer close(ret)
+	uitask <- &uimsg{
+		call:		_sendMessage,
+		p:		[]uintptr{
+			uintptr(s.hwnd),
+			uintptr(_PBM_SETPOS),
+			uintptr(_WPARAM(percent)),
+			uintptr(0),
+		},
+		ret:		ret,
+	}
+	<-ret
+}