发送消息-点击按钮

1、正确：  SendMessage(HWND, WM_LBUTTONDOWN, 0, 0);  //鼠标左键按下  Sleep(10);  SendMessage(HWND, WM_LBUTTONUP, 0, 0);    //鼠标左键放开

错误  PostMessage(HWND, WM_LBUTTONDOWN, 0, 0);      Sleep(10);  PostMessage(HWND, WM_LBUTTONUP, 0, 0); 

2、按键 按下和弹起 必须用SendMessage

推荐使用此消息  SendMessage(HWND, BM_CLICK, 0, 0);   //模拟单击某按钮 BM即button message

另一种点击按钮的方法  SendMessage(HWND_Button, WM_KEYDOWN, VK_SPACE, 0);   //按下空格 相当于点击按钮  Sleep(10);  SendMessage(HWND_Button, WM_KEYUP, VK_SPACE, 0);     //放开空格 相当于点击按钮

3、SendMessage(HWND_Button, WM_SETFOCUS, 0, 0);          //给按钮设置一下焦点SendMessage(TreeView.Handle,TVM_SETBKCOLOR,0,RGB(255,0,0));　设置TV背景颜色SendMessage(Button.Handle,WM_LBUTTONDOWN,0,0);　　鼠标左键按下SendMessage(Button.Handle,WM_LBUTTONUP,0,0);　　　鼠标左键抬起SendMessage(Edit.Handle,WM_SETTEXT,255,Integer(PChar('abc')));　传递文本SendMessage(Edit.Handle,WM_Char,Wparam('Q'),2);　　传递字符SendMessage(Button.Handle,BM_SETSTYLE,BS_RADIOBUTTON,1);　　改变Button风格SendMessage(ComboBox.Handle,CB_SETDropPEDWIDTH,300,0);　　改变CBDownWidth