[RESOLVED] I'm able to move the mouse pointer and right click but left click doesn't work

Code:

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#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <iostream>

using namespace std;

int main()
{

INPUT *mouse;

mouse = new INPUT;
mouse->type = INPUT_MOUSE;
mouse->mi.dx = 65535;
mouse->mi.dy = 65535;
mouse->mi.mouseData = 0;
mouse->mi.dwFlags = MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_MOVE;
mouse->mi.time = 0;
mouse->mi.dwExtraInfo = 0;
SendInput(1,mouse,sizeof(INPUT));

mouse->mi.dx = 0;
mouse->mi.dy = 0;
mouse->mi.dwFlags = MOUSEEVENTF_RIGHTDOWN|MOUSEEVENTF_RIGHTUP;
SendInput(1,mouse,sizeof(INPUT));

return 0;
}

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I do not know why right click works but not left click.

EDIT: I use autohide so I clicked before the taskbar popped up. Problem resolved.

Please explain your test case, and define "work" and "not work".

...and contemplate a bit over this sample

Code:

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#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <iostream>

using namespace std;

int main()
{

        INPUT mouse = {0};

        mouse.type = INPUT_MOUSE;
        mouse.mi.dx = 65535;
        mouse.mi.dy = 65535;
        mouse.mi.mouseData = 0;
        mouse.mi.dwFlags = MOUSEEVENTF_ABSOLUTE|MOUSEEVENTF_MOVE;
        mouse.mi.time = 0;
        mouse.mi.dwExtraInfo = 0;
        SendInput(1, &mouse, sizeof(INPUT));  // move to the most right-bottom point

        mouse.mi.dx = -10;
        mouse.mi.dy = -10;
        mouse.mi.dwFlags = MOUSEEVENTF_MOVE;
        SendInput(1, &mouse, sizeof(INPUT));  // position it over the clock, a bit left and up

        mouse.mi.dx = 0;
        mouse.mi.dy = 0;
        mouse.mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
        SendInput(1, &mouse, sizeof(INPUT));  // press left button...

        Sleep(40);                            // ...let Windows understand the action

        mouse.mi.dwFlags = MOUSEEVENTF_LEFTUP;
        SendInput(1, &mouse, sizeof(INPUT));  // ...and release the button

        return 0;
}

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I wanted to left click on the Show Desktop button. If it worked properly, the desktop would be visible.

May I know why it's necessary for having an interval between the mouse down and mouse up events? Don't the two of them in succession imply a click? Do we have to give co-ordinate data for the mouse down and mouse up events? The program seems to work without them.

The reason my program didn't work initially was because Autohide took a while to display the taskbar. Since the program was too fast, it ended up clicking on the desktop and as you'd expect nothing happened.

Thank you for your help!

Quote:

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why it's necessary for having an interval between the mouse down and mouse up events?

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Well, I have a faint recollection about this point somewhere in the documentation, but not sure right now. Besides, it might be true for old versions, you know. Anyway, I think it's always better to completely imitate user's behavior. In real, your click isn't this swift, and there is always some interval between down and up.

Quote:

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Do we have to give co-ordinate data for the mouse down and mouse up events?

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No we don't. It's just a habit about clearing any data that left the context where they had a sense. :)

Rather than using Sleep( ), set the time struct member.

Code:

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mouse.mi.time = GetTickCount( );

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I have almost the same case.
I need to click on particulate point on desktop of my Windows XP. I write such code:

Code:

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INPUT i;
memset(&i, 0, sizeof(INPUT));

i.type = INPUT_MOUSE;

// msdn says about "normalized" coordinates, I recalculate it.
// "Absolute" coordinates are: х = 66, у = 925.
i.mi.dx = POS_X; // #define POS_X 3379
i.mi.dy = POS_Y; // #define POS_Y 59199
i.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_VIRTUALDESK;
i.mi.mouseData = 0;
i.mi.time = 0;

SendInput(1, &i, sizeof(INPUT));
i.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_LEFTUP | MOUSEEVENTF_VIRTUALDESK;
SendInput(1, &i, sizeof(INPUT));

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It perfectly works with mouse clicks - left, right, no matter, I tried all. But - all this clicks are just in point where mouse cursor is, not at point with right coordinates. Of course, I can use SetCursorPos, and avoid the problem, but - why do not work SendInput with mouse movements?
msdn says:

Quote:

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If MOUSEEVENTF_ABSOLUTE value is specified, dx and dy contain normalized absolute coordinates between 0 and 65,535. The event procedure maps these coordinates onto the display surface. Coordinate (0,0) maps onto the upper-left corner of the display surface; coordinate (65535,65535) maps onto the lower-right corner. In a multimonitor system, the coordinates map to the primary monitor.

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