Added declarations of WinApi functions working with window text

deploy/[Notepad++ Directory]/plugins/jN/lib/User32.dll.js

@@ -8,3 +8,7 @@ User32.Define("SetParent", "HWND", "HWND");
 User32.Define("GetWindowLongW", "HWND", "int");
 User32.Define("SetWindowLongW", "HWND", "int", "LONG_PTR");
 User32.Define("SetWindowPos", "HWND", "HWND", "int","int","int","int","UINT");
+User32.Define("FindWindowExW", "HWND", "HWND", "LPCTSTR", "LPCTSTR");
+User32.Define("GetWindowTextW", "HWND", "LPCTSTR", "int");
+User32.Define("SetWindowTextW", "HWND", "LPCTSTR");
+User32.Define("GetWindowTextLengthW", "HWND");  

deploy/[Notepad++ Directory]/plugins/jN/lib/Window.js

@@ -0,0 +1,27 @@
+require("User32.dll.js");
+
+function Window(handle){
+	this.Handle = handle;
+}
+
+Window.prototype.GetWindowText = function(){
+	var bufferLength = User32.GetWindowTextLengthW(this.Handle);
+	var buffer = User32.NativeLibrary.alloc(bufferLength*2 + 2);
+	var copiedChars = User32.GetWindowTextW(this.Handle, buffer, buffer.length/2);
+	return buffer;
+}
+
+Window.prototype.SetWindowText = function(text){
+	User32.SetWindowTextW(this.Handle, text);
+}
+
+Window.FindByClass = function(parent, windowClass){
+	if (parent == null)
+		return null;
+
+	var windowHandle = User32.FindWindowExW(parent, 0, windowClass, "");
+	if (windowHandle == null)
+		return null;
+
+	return new Window(windowHandle); 
+}