windows - Disable X-Button Icon on the top of the right in Messagebox Using C++ Win32 API?

Question

i am using C++ win32 API...

i have a Windows messagebox contain OKCANCEL Button...

the messagebox have a close(X-Button) on the right top...

retun1=MessageBox(hDlg,TEXT("Your password will expired,you must change the password"),TEXT("Logon Message"),MB_OK | MB_ICONINFORMATION);

i only want to close the messagebox using the CANCEL Button...

So,i want to disable the X-Button Icon...

i am already try MB_ICONMASK MB_MODEMASK Somethink like that.

But i cant get it,what i need...

How can i Resolve it?

Answer 1

In your OnInitDialog, you can try:

CMenu* pSysMenu = GetSystemMenu(FALSE);

if (pSysMenu != NULL)
{
//disable the X
pSysMenu->EnableMenuItem (SC_CLOSE, MF_BYCOMMAND|MF_GRAYED);
}