MFC,无边框的对话框如何实现窗体大小调整。。。。。。。。。

一直没有实现，最后50分啦
希望你帮我解决：

提供一个最简单的无边框对话框能用鼠标拖动来调整窗体大小的代码

或者

指正我看下我的代码有什么问题

任一都可


以下是我测试的关键代码：

按网上的相关文章，我自己按一个方式来实现，
1、将资源对话框的border设置为none
2、响应 WM_NCHITTEST WM_SETCURSOR WM_NCLBUTTONDOWN 这三个消息。

消息处理函数:

UINT CXXXDlg::OnNcHitTest(UINT nHitTest, CPoint point)
{
CRect rect;
GetWindowRect(&rect);
if(point.x <= rect.left+3)
return HTLEFT;
else if(point.x >= rect.right-3)
return HTRIGHT;
else if(point.y <= rect.top+3)
return HTTOP;
else if(point.y >= rect.bottom-3)
return HTBOTTOM;
else if(point.x <= rect.left+10 && point.y <= rect.top+10)
return HTTOPLEFT;
else if(point.x >= rect.right-10 && point.y <= rect.top+10)
return HTTOPRIGHT;
else if(point.x <= rect.left+10 && point.y >= rect.bottom-10)
return HTBOTTOMLEFT;
else if(point.x >= rect.right-10 && point.y >= rect.bottom-10)
return HTBOTTOMRIGHT;

return 0;
}


BOOL CXXXDlg::OnSetCursor(HWND hWnd, UINT nHitTest, UINT message)
{
if(nHitTest == HTCAPTION || nHitTest == HTSYSMENU ||
nHitTest == HTMENU || nHitTest == HTCLIENT)
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW)));
}
else if(nHitTest == HTTOP || nHitTest == HTBOTTOM)
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENS)));
}
else if(nHitTest == HTLEFT || nHitTest == HTRIGHT)
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZEWE)));
}
else if(nHitTest == HTTOPLEFT || nHitTest == HTBOTTOMRIGHT)
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENWSE)));
}
else if(nHitTest == HTTOPRIGHT || nHitTest == HTBOTTOMLEFT)
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENESW)));
}
else
{
SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW)));
}
}


void CXXXDlg::OnNcLButtonDown(UINT nHitTest, CPoint point)
{
if(nHitTest == HTTOP)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOP, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTBOTTOM)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOM, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTLEFT)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_LEFT, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTRIGHT)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_RIGHT, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTTOPLEFT)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPLEFT, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTTOPRIGHT)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPRIGHT, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTBOTTOMLEFT)
SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMLEFT, MAKELPARAM(point.x, point.y));
else if(nHitTest == HTBOTTOMRIGHT)
SendMessage(WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMRIGHT, MAKELPARAM(point.x, point.y));
}


不过我发现鼠标在移动到窗体的边缘时，并不会出现可拖放的鼠标样式，而且也改变不了窗体大小


于是我把该窗体的Client Edge设置 为true，这样，就可以实现理想的效果了。可是这样的问题是窗体会有一个很明显的边，很难看，既然打算用无边框的窗体，那么这个边还是不打算设置



谁有办法解决这个问题？？？？？不要边，却能实现窗体大小的调整？