类似于flashGet悬浮窗的东西怎么实现？ 是从CWnd继承来的吗？

Question

CWnd wnd;
wnd.Attach(::GetDesktopWindow());
m_MyWnd.Create(IDD_DESKTOPBARDLG_DIALOG,&wnd);
//.....
wnd.Detach();

Answer 1

你的窗口类的实例。就是：
 CFloatDlg m_MyWnd;understand?

Answer 2

bool cdrawtestapp::initinstance()
{
    crect rect(0, 0, 320, 150);
    ctransparentwnd* ptwnd = new ctransparentwnd;
    m_pmainwnd = ptwnd;
    pframe->createtransparent("transparent test", rect, idb_mask, idb_back);
    pframe->showwindow(sw_show);
    pframe->updatewindow();
    return true;
}
void ctransparentwnd::setupregion(cdc *pdc, unsigned short maskid)
{
    cdc              memdc;
    cbitmap         cbitmap;
    cbitmap*        poldmembmp = null;
    colorref        col;
    crect            crect;
    int              x, y;
    crgn             m_rgn, rgntemp;    getwindowrect(&crect);    cbitmap.loadbitmap(maskid);
    memdc.createcompatibledc(pdc);
    poldmembmp = memdc.selectobject(&cbitmap);    m_rgn.createrectrgn(0, 0, crect.width(), crect.height());
    for(x=0; x<=crect.width(); x++)
    {
        for(y=0; y<=crect.height(); y++)
        {
            col = memdc.getpixel(x, y);
            if(col == 0)
            {
                rgntemp.createrectrgn(x, y, x+1, y+1);
                m_rgn.combinergn(&m_rgn, &rgntemp, rgn_xor);
                rgntemp.deleteobject();     
            }
        }
    }
    if (poldmembmp) memdc.selectobject(poldmembmp);
    setwindowrgn((hrgn)m_rgn, true);
}void ctransparentwnd::onlbuttondown(uint nflags, cpoint point) 
{
    cwnd::onlbuttondown(nflags, point);
    postmessage(wm_nclbuttondown, htcaption, makelparam(point.x,point.y));
}

Answer 3

typedef BOOL (FAR PASCAL*LAYERFUNC)(HWND,COLORREF,BYTE,DWORD);
void SetTransparent(HWND hwnd,UINT alpha)
{
LAYERFUNC SetLayer;
HMODULE hmod=LoadLibrary("user32.dll");
SetWindowLong(hwnd,GWL_EXSTYLE,GetWindowLong(hwnd,GWL_EXSTYLE)|0x80000L);
SetLayer=(LAYERFUNC)GetProcAddress(hmod,"SetLayeredWindowAttributes");
SetLayer(hwnd,0,(255*alpha)/100,0x2); FreeLibrary(hmod);
}只能在WinNT下执行，要9x下自己写算法。