visual-c – 为什么在使用Touch Injection API和WIN8时只注入一

这适用于单触式接触.
然而,当我添加4个以上的联系人时,没有任何变化,即它产生的效果就像只有一个联系人一样. (我通过打开屏幕右侧的Paint和左侧的visual studio进行测试.然后当程序运行时,在绘图窗口中对角线绘制线条).
当我在InitializeTouchInjection之后运行GetLastError()时,它给出了5,这是一个无效的访问错误.

我应该使用一面旗帜吗？我的电脑是否需要安装某个驱动程序？这里有什么不对？

这是代码：

#include <windows.h>

void Drag(int x,int y){
    POINTER_TOUCH_INFO contact_[5];
    BOOL bRet = TRUE;

    InitializeTouchInjection(5,TOUCH_FEEDBACK_DEFAULT);

    for (int c=0;c<5;c++)
    {
        POINTER_TOUCH_INFO &contact=contact_[c];
        memset(&contact,sizeof(POINTER_TOUCH_INFO));
        contact.pointerInfo.pointerType = PT_TOUCH;
        contact.pointerInfo.pointerId = c;          //contact 0
        contact.pointerInfo.ptPixelLocation.y = y; // Y co-ordinate of touch on screen
        contact.pointerInfo.ptPixelLocation.x = x+50*c; // X co-ordinate of touch on screen

        contact.touchFlags = TOUCH_FLAG_NONE;
        contact.touchMask = TOUCH_MASK_CONTACTAREA | TOUCH_MASK_ORIENTATION | TOUCH_MASK_PRESSURE;
        contact.orientation = 90; // Orientation of 90 means touching perpendicular to screen.
        contact.pressure = 32000; 

        // defining contact area (I have taken area of 4 x 4 pixel)
        contact.rcContact.top = contact.pointerInfo.ptPixelLocation.y - 2;
        contact.rcContact.bottom = contact.pointerInfo.ptPixelLocation.y + 2;
        contact.rcContact.left = contact.pointerInfo.ptPixelLocation.x  - 2;
        contact.rcContact.right = contact.pointerInfo.ptPixelLocation.x  + 2;

        //contact.pointerInfo.pointerFlags = POINTER_FLAG_DOWN | POINTER_FLAG_INRANGE | POINTER_FLAG_INCONTACT;
        contact.pointerInfo.pointerFlags = POINTER_FLAG_UPDATE | POINTER_FLAG_INRANGE ;//| POINTER_FLAG_INCONTACT;
    }
    InjectTouchInput(5,contact_); // Injecting the touch down on screen
    Sleep(20);

    for(int i=0;i<200;i++)
    {
        for (int c=0;c<5;c++)
        {
            POINTER_TOUCH_INFO &contact=contact_[c];
            contact.pointerInfo.ptPixelLocation.x--; // updating the X Co-ordinate to x-100 pixels
            contact.pointerInfo.ptPixelLocation.y++;

            contact.rcContact.top = contact.pointerInfo.ptPixelLocation.y - 2;
            contact.rcContact.bottom = contact.pointerInfo.ptPixelLocation.y + 2;
            contact.rcContact.left = contact.pointerInfo.ptPixelLocation.x  - 2;
            contact.rcContact.right = contact.pointerInfo.ptPixelLocation.x  + 2;
            if (i==100)
                contact.pointerInfo.pointerFlags = POINTER_FLAG_INCONTACT | POINTER_FLAG_INRANGE | POINTER_FLAG_DOWN;
            if (i>100)
                contact.pointerInfo.pointerFlags = POINTER_FLAG_INCONTACT | POINTER_FLAG_INRANGE | POINTER_FLAG_UPDATE;
        }
        InjectTouchInput(5,contact_); // Injecting the touch down on screen
        Sleep(20);
    }
    // Lifts the touch input UP
    for (int c=0;c<5;c++)
    {
        POINTER_TOUCH_INFO &contact=contact_[c];
        contact.pointerInfo.pointerFlags = POINTER_FLAG_INRANGE | POINTER_FLAG_UP;
    }
    InjectTouchInput(5,contact_); // Injecting the touch down on screen
    Sleep(10);
}

int WINAPI WinMain( HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
     Drag(1300,500);
}