使用mouse_event来模拟一次选中文本框中的文本

使用mouse_event可以模拟一些通过鼠标执行的事情，下面我们就来模拟一次鼠标在EDIT中选择一段文本的过程。

首先我们来分解一下选中文本的鼠标动作，其包括基本方面：

将鼠标移动到指定的位置，文本的开始处

按下鼠标(WM_LBUTTONDOWN)

在按下鼠标的同时移动鼠标到指定的位置

松开鼠标左键(WM_LBUTTONUP)

知道了这个过程我们就来通过程序来模拟吧。我自己实验的时候建立了DIALOG工程，在DIALOG上放了一个BUTTON，一个EDIT，将程序写到BUTTON事件中，程序如下：

void CTestChkDlg: nBnClickedButton1()
{
RECT rect;
GetDlgItem(IDC_EDIT)->GetWindowRect(&rect);
SetCursorPos(rect.left+5,rect.top+5);
mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_LEFTDOWN,rect.left+1,rect.top+1,0,0);
SetCursorPos(rect.left+60,rect.top+10);
//mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_MOVE,500,600,0,0);
mouse_event(MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_LEFTUP,rect.left+60,rect.top+5,0,0);

}

首先我们需要做的是取得EDIT的位置，然后将鼠标移动到那里(SetCursorPos)，这里加5是让鼠标在EDIT里面，因为EDIT有边，如果按照RECT的值来可能选择不了；然后使用MOUSEEVENTF_LEFTDOWN来按下鼠标，在按下鼠标的时候再将鼠标移动到文本的指定位置，然后松开鼠标。好了文本选中了。

鼠标模拟函数：

VOID mouse_event(  DWORD dwFlags, // flags specifying various motion/click variants  DWORD dx,      // horizontal mouse position or position change  DWORD dy,      // vertical mouse position or position change  DWORD dwData,  // amount of wheel movement  DWORD dwExtraInfo                  // 32 bits of application-defined information);

Parameters

dwFlags A set of flag bits that specify various aspects of mouse motion and button clicking. The bits in this parameter can be any reasonable combination of the following values:

Value	Meaning
MOUSEEVENTF_ABSOLUTE	指定鼠标绝对坐标
MOUSEEVENTF_MOVE	Specifies that movement occurred.
MOUSEEVENTF_LEFTDOWN	Specifies that the left button is down.
MOUSEEVENTF_LEFTUP	Specifies that the left button is up.
MOUSEEVENTF_RIGHTDOWN	Specifies that the right button is down.
MOUSEEVENTF_RIGHTUP	Specifies that the right button is up.
MOUSEEVENTF_MIDDLEDOWN	Specifies that the middle button is down.
MOUSEEVENTF_MIDDLEUP	Specifies that the middle button is up.
MOUSEEVENTF_WHEEL	Windows NT: Specifies that the wheel has been moved, if the mouse has a wheel. The amount of movement is given in dwData

键盘模拟函数

VOID keybd_event(  BYTE bVk,           // virtual-key code  BYTE bScan,         // hardware scan code  DWORD dwFlags,      // flags specifying various function options  DWORD dwExtraInfo   // additional data associated with keystroke);

Parameters

bVk Specifies a virtual-key code. The code must be a value in the range 1 to 254. bScan Specifies a hardware scan code for the key. dwFlags A set of flag bits that specify various aspects of function operation. An application can use any combination of the following predefined constant values to set the flags.

Value	Meaning
KEYEVENTF_EXTENDEDKEY	If specified, the scan code was preceded by a prefix byte having the value 0xE0 (224).
KEYEVENTF_KEYUP