구차니의 잡동사니 모음

m_eterm0.SetSel(0, -1);

m_eterm0.Clear();

m_eterm0.EmptyUndoBuffer();

m_eterm0.SetWindowTextW(_T("")); 

CEdit::SetLimitText

void SetLimitText( UINT nMax );

Parameters

nMax

The new text limit, in bytes. 

CEdit::LimitText

void LimitText( int nChars = 0 );

Parameters

nChars

Specifies the length (in bytes) of the text that the user can enter. If this parameter is 0, the text length is set to UINT_MAX bytes. This is the default behavior. 

digitalWrite(RELAY1,LOW); // Turns ON Relays 1

Serial.println("Light ON");

delay(2000); // Wait 2 seconds

digitalWrite(RELAY1,HIGH); // Turns Relay Off

Serial.println("Light OFF");

delay(2000); 

A접점(arbeit contact)은 전기적으로 릴레이에 전류가 흐르면 동작하여 닫히는(ON) 접점

(normally open contact). 

B접점(break contact)은 전기전으로 릴레이에 전류가 흐르면 동작하여 접점이 열리는(OFF) 접점.

상시폐접점(normally closed contact).

C접점(change-over contact)은 a, b접점부를 공유, 트랜스퍼 접점(transfer contact) 이라고도 함.

A접점=NO(Normally open)

B접점=NC(Normally closed)

C접점=Transfer contact

class CAboutDlg : public CDialog

{

void CD2XXNotifyDlg::OnPaint();

BOOL CD2XXNotifyDlg::OnDeviceChange(UINT EventType, DWORD dwData);

protected:

DECLARE_MESSAGE_MAP()

};

void CAboutDlg::DoDataExchange(CDataExchange* pDX){}

BEGIN_MESSAGE_MAP(CD2XXNotifyDlg, CDialog)

ON_WM_PAINT()

ON_WM_DEVICECHANGE()

END_MESSAGE_MAP()

void CD2XXNotifyDlg::OnPaint()

{}

BOOL CD2XXNotifyDlg::OnDeviceChange(UINT EventType, DWORD dwData) {}

#define ON_WM_DEVICECHANGE() \

{ WM_DEVICECHANGE, 0, 0, 0, AfxSig_bwl, \

(AFX_PMSG)(AFX_PMSGW) \

(static_cast< BOOL (AFX_MSG_CALL CWnd::*)(UINT, DWORD_PTR) > ( &ThisClass :: OnDeviceChange)) }, 

    case WM_DEVICECHANGE:
    {
        //
        // This is the actual message from the interface via Windows messaging.
        // This code includes some additional decoding for this particular device type
        // and some common validation checks.
        //
        // Note that not all devices utilize these optional parameters in the same
        // way. Refer to the extended information for your particular device type 
        // specified by your GUID.
        //
        PDEV_BROADCAST_DEVICEINTERFACE b = (PDEV_BROADCAST_DEVICEINTERFACE) lParam;
        TCHAR strBuff[256];

        // Output some messages to the window.
        switch (wParam)
        {
        case DBT_DEVICEARRIVAL:
            msgCount++;
            StringCchPrintf(
                strBuff, 256, 
                TEXT("Message %d: DBT_DEVICEARRIVAL\n"), msgCount);
            break;
        case DBT_DEVICEREMOVECOMPLETE:
            msgCount++;
            StringCchPrintf(
                strBuff, 256, 
                TEXT("Message %d: DBT_DEVICEREMOVECOMPLETE\n"), msgCount);
            break;
        case DBT_DEVNODES_CHANGED:
            msgCount++;
            StringCchPrintf(
                strBuff, 256, 
                TEXT("Message %d: DBT_DEVNODES_CHANGED\n"), msgCount);
            break;
        default:
            msgCount++;
            StringCchPrintf(
                strBuff, 256, 
                TEXT("Message %d: WM_DEVICECHANGE message received, value %d unhandled.\n"), 
                msgCount, wParam);
            break;
        }
        OutputMessage(hEditWnd, wParam, (LPARAM)strBuff); 

} 

DBT_DEVNODES_CHANGED 0x0007

DBT_DEVICEARRIVAL 0x8000

DBT_DEVICEREMOVECOMPLETE 0x8004