Update md & test

doc.md

@@ -203,7 +203,8 @@ robotgo.ScrollMouse(50, "down");
 
     Returns an object with .width and .height.
 
-###.ScreenCapture
+###.CaptureScreen
+    //ScreenCapture
 
     Gets part or all of the screen.
 
@@ -213,7 +214,7 @@ robotgo.ScrollMouse(50, "down");
     y (optional)
     height (optional)
     width (optional)
-    If no arguments are provided, screen.capture will get the full screen.
+    If no arguments are provided, screencapture will get the full screen.
 
 ####Return:
 

test/main.go

@@ -22,6 +22,9 @@ func arobotgo() {
 	// robotgo.KeyToggle("enter", "down")
 	robotgo.TypeString("en")
 
+	bit_map := robotgo.CaptureScreen(10, 20, 30, 40)
+	Println("...", bit_map)
+
 	// robotgo.MouseClick()
 	robotgo.ScrollMouse(10, "up")
 }

zh_doc.md

@@ -102,7 +102,7 @@ robotgo.MoveMouse(100, 100);
 ```
 
 ###.MoveMouseSmooth(x, y)
-    模拟鼠标向X，Y移动(像人类一样)，用鼠标按钮向上
+    模拟鼠标向X，Y平滑移动(像人类一样)，用鼠标按钮向上
 
     Moves mouse to x, y human like, with the mouse button up.
 
@@ -221,7 +221,8 @@ robotgo.ScrollMouse(50, "down");
 
     Returns an object with .width and .height.
 
-###.ScreenCapture
+###.CaptureScreen
+    //ScreenCapture
     获取部分或者全部屏幕
     Gets part or all of the screen.