CWnd* pWnd为你控件的指针,LPCTSTR lpszClassName是你控件的类名,比如编辑框是"Edit",按钮是"Button",详情可以使用SPY++查看.
BOOL ModifyControlStyle(CWnd* pWnd,LPCTSTR lpszClassName,DWORD dwRemove,DWORD dwAdd,DWORD dwRemoveEx,DWORD dwAddEx)
{
CWnd* pParentWnd = pWnd->GetParent();
CFont* pFont = pWnd->GetFont();
CString strText;
pWnd->GetWindowText(strText);
{
// 在此添加保存控件其他属性的代码,我只保存了字体和文字
}
CRect rcWindow;
pWnd->GetWindowRect(&rcWindow);
pParentWnd->ScreenToClient(rcWindow);
DWORD dwNewStyle = (pWnd->GetStyle() & ~dwRemove) | dwAdd;
DWORD dwNewStyleEx = (pWnd->GetExStyle() & ~dwRemoveEx) | dwAddEx;
UINT nID = pWnd->GetDlgCtrlID();
pWnd->ShowWindow(SW_HIDE);
pWnd->DestroyWindow();
BOOL bResult = pWnd->CreateEx(dwNewStyleEx,lpszClassName,strText,dwNewStyle,rcWindow,pParentWnd,nID);
pWnd->SetFont(pFont);
return bResult;
}
测试代码:
void CAboutDlg::OnButton()
{
CWnd* pWnd = GetDlgItem(IDC_EDIT1);
if(pWnd->GetStyle() & ES_PASSWORD)
{
ModifyControlStyle(pWnd,"Edit",ES_PASSWORD,0,0,0);
}
else
{
ModifyControlStyle(pWnd,"Edit",0,ES_PASSWORD,0,0);
}
}