C / C++ / MFC

Nelek wrote:

CSomeDialog::SomeMethod()
{
HANDLE p_Dlg = GetDlgItem((HANDLE)this, IDC_YOURDIALOG);
//...
}

1. GetDlgItem's first parameter is a HWND, not a HANDLE. Your code will give a compiler error.
2. Even is the code was modified to look like the following, it would still be wrong:
   HWND p_Dlg = GetDlgItem((HWND)this, IDC_YOURDIALOG);
   Using what in this case is essentially a reinterpret_cast doesn't make a pointer a HWND. The cast just tells the compiler that although it knows a pointer isn't a HWND and would normally not normally compile code that incorrectly assumes it is, that in this case it should just shut-up and plough on.

Anu_Bala wrote:

Im using Setwindowpos of one dialog in another class.

Anu_Bala wrote:

if i use Setwindowpos,it shows arror.

rbwest86 wrote:

...reading information from hardware devices.

Le@rner wrote:

not working

	for(int i=750; i>100; i-=200)
		Beep(i,50+i/5);
	
	Beep( 150, 100 );
	
	HRESULT lCode=GetLastError();
	LPVOID lpMsgBuf;
	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
	lCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
	(LPWSTR) &lpMsgBuf,0,NULL );
	MessageBox((LPCTSTR)lpMsgBuf, _T("Error"), MB_OK | MB_ICONINFORMATION );
//message is "The RPC server is unavilable."
	LocalFree( lpMsgBuf );

	MessageBeep(MB_ICONASTERISK);
	
	HRESULT lCode=GetLastError();
	LPVOID lpMsgBuf;
	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL,
	lCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
	(LPWSTR) &lpMsgBuf,0,NULL );
	MessageBox((LPCTSTR)lpMsgBuf, _T("Error"), MB_OK | MB_ICONINFORMATION );
//message is "The request is not supported."
	LocalFree( lpMsgBuf );