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///////////////////////////////////////////////////////////////////////////////
//
// CTwainEventHandler
// ------------------
// Subclassing (main) window for Twain messages
//
////Holger Kloos, 2003/////////////////////////////////////////////////////////
#ifndef _TWAINEVENTHANDLER_H__
#define _TWAINEVENTHANDLER_H__
interface IMsgLink
{
virtual BOOL OnWinMsg(const MSG* pMsg) = 0;
};
class CTwainEventHandler
{
public:
CTwainEventHandler();
virtual ~CTwainEventHandler();
BOOL Connect(IMsgLink* pMsgLink);
BOOL DisConnect();
void SetWindowHandle(HWND hWnd) { m_hWnd = hWnd; }
HWND GetWindowHandle() const { return m_hWnd; }
HWND* GetWindowHandlePtr() { return &m_hWnd; }
private:
LRESULT OnWndMsg(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) const;
static LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
IMsgLink* m_pMsgLink;
WNDPROC m_OrgWndProc;
HWND m_hWnd;
};
#endif
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