Simulating mouse click

[britto]

Simulating mouse click

#include <windows.h>
using namespace std;
// Forward declaration of the LeftClick function
void LeftClick ( );

// Forward declaration of the MouseMove function
void MouseMove ( int x, int y );

int main()
{
    MouseMove(100, 100);
    LeftClick();
    return 0;
}

// LeftClick function
void LeftClick ( )
{
  INPUT    Input={0};
  // left down
  Input.type      = INPUT_MOUSE;
  Input.mi.dwFlags  = MOUSEEVENTF_LEFTDOWN;
  ::SendInput(1,&Input,sizeof(INPUT));

  // left up
  ::ZeroMemory(&Input,sizeof(INPUT));
  Input.type      = INPUT_MOUSE;
  Input.mi.dwFlags  = MOUSEEVENTF_LEFTUP;
  ::SendInput(1,&Input,sizeof(INPUT));
}

// MouseMove function
void MouseMove (int x, int y )
{
    double fScreenWidth    = ::GetSystemMetrics( SM_CXSCREEN )-1;
    double fScreenHeight  = ::GetSystemMetrics( SM_CYSCREEN )-1;
    double fx = x*(65535.0f/fScreenWidth);
    double fy = y*(65535.0f/fScreenHeight);
    INPUT  Input={0};
    Input.type      = INPUT_MOUSE;
    Input.mi.dwFlags  = MOUSEEVENTF_MOVE|MOUSEEVENTF_ABSOLUTE;
    Input.mi.dx = fx;
    Input.mi.dy = fy;
    ::SendInput(1,&Input,sizeof(INPUT));
}

Hi I was trying to use this code to simulate mouse click but i get "Unable to resolve identifier mi". Im not sure if im missing something. Im using netbeans IDE. Please help im new to cpp. Thanks in advance.

[deceptikon]

There's nothing wrong with your usage of INPUT::mi, and Visual Studio compiles it just fine (barring an unrelated warning about a narrowing conversion). What OS are you using? If it's Windows 2000 or later (highly likely) then perhaps there's a setting in NetBeans that's restricting features of the Win32 API. I'm just speculating though, as I'm not familiar with using NetBeans as an IDE/compiler. Maybe someone else can weigh in on it.

[britto]

Im using windows 7 and Netbeans 6.8

[happyHacker]

Try adding

Input.mi.dwExtraInfo = GetMessageExtraInfo();

and put in some

UINT ret = //sendinput
assert(ret != 0);

That way if you get an assertion failure you can get an error message from it and go from there.

[triumphost]

His code compiles fine. I don't know why Netbeans gives you compile time errors.

Alternatively, you can try what I use.. Should be fairly similar:

void ClickMouse(HWND Handle, int X, int Y, bool ClickLeft)
{
    UINT UP = ClickLeft ? WM_LBUTTONUP : WM_RBUTTONUP;
    UINT DOWN = ClickLeft ? WM_LBUTTONDOWN : WM_RBUTTONDOWN;
    WPARAM wParam = ClickLeft ? MK_LBUTTON : MK_RBUTTON;

    PostMessage(Handle, DOWN, wParam, MAKELPARAM(X, Y));
    PostMessage(Handle, UP, wParam, MAKELPARAM(X, Y));
}

I'll leave it to you to write the moving one. It's literally the same (different flags though). Only one PostMessage Required. You can also change PostMessage to SendMessage if you wish.