www.pudn.com > RBGContrast.rar > contprop.h

//------------------------------------------------------------------------------ 
// File: ContProp.h 
// 
// Desc: DirectShow sample code - definition of property page class for 
//       the contrast filter. 
// 
// Copyright (c) Microsoft Corporation.  All rights reserved. 
//------------------------------------------------------------------------------ 
 
 
class CContrastProperties : public CBasePropertyPage 
{ 
 
public: 
 
    static CUnknown * WINAPI CreateInstance(LPUNKNOWN lpunk, HRESULT *phr); 
 
private: 
 
    BOOL OnReceiveMessage(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam); 
    HRESULT OnConnect(IUnknown *pUnknown); 
    HRESULT OnDisconnect(); 
    HRESULT OnDeactivate(); 
    HRESULT OnApplyChanges(); 
 
    void SetDirty(); 
 
    HWND    CreateSlider(HWND hwndParent); 
    void    OnSliderNotification(WPARAM wParam); 
    HWND    m_hwndSlider; 
 
    CContrastProperties(LPUNKNOWN lpunk, HRESULT *phr); 
    signed char m_cContrastOnExit; // Remember contrast level for CANCEL 
    signed char m_cContrastLevel;  // And likewise for next activate 
 
    IContrast *m_pContrast; 
 
    IContrast *pIContrast() { 
        ASSERT(m_pContrast); 
        return m_pContrast; 
    }; 
 
}; // CContrastProperties