vc 使用SetWindowPos改变窗体的大小，实现折叠，展开

void CWork::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
SetWindowPos(NULL,0,0,900,460,SWP_NOMOVE | SWP_NOZORDER);

//折叠窗体
void CWork::Onkuozhan() 
{
    // TODO: Add your control notification handler code here
//     CRect rect;
//     GetClientRect(&rect);//得到客户端矩形
//     MoveWindow(rect.Width()/3,rect.Height()/3,rect.Width(),rect.Height()/1.5);//移动窗口
    SetWindowPos(NULL,0,0,900,460,SWP_NOMOVE | SWP_NOZORDER);

    //CMenu *pMenu=GetMenu();//获取菜单栏主菜单
    //CMenu *pTestMenu=pMenu->GetSubMenu(1);//获取子菜单
}
//展开窗体
void CWork::Onhuanyuan() 
{
    // TODO: Add your control notification handler code here
    SetWindowPos(NULL,0,0,900,730,SWP_NOMOVE | SWP_NOZORDER);
}