95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
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/*==========================================================================
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*
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* Copyright (C) 1999 Microsoft Corporation. All Rights Reserved.
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*
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* File: peakmetr.h
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* Content: Implements a peak meter custom control
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*
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* History:
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* Date By Reason
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* ==== == ======
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* 09/22/99 pnewson Created
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***************************************************************************/
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#ifndef _PEAKMETR_H_
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#define _PEAKMETR_H_
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// How to use this custom control
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//
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// In your code:
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// 1) Include peakmetr.h in your project
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// 2) Create an instance of the CPeakMeterWndClass class
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// 3) Call Register() on that instance to register the window class
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// 4) Send the control PM_SETMAX, PM_SETMIN, PM_SETCUR, PM_SETSTEPS
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// messages as required.
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// 5) When you are no longer using the control, call unregister
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// 6) Destroy the CPeakMeterWndClass object
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//
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// In the dialog editor
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// 1) Add a "Custom Control" to your dialog box
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// 2) In the properties for that custom control, specify
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// "DirectPlayVoicePeakMeter" for the window class
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// Peak Meter windows messages:
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//
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// PM_SETMIN
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// wParam = 0;
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// lParam = (LPARAM)dwNewMinValue;
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//
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// Set the new minimum value for the peak meter, i.e. the
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// value that represents the bottom of the meter range.
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// If this message is not sent, the control defaults to 0.
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// The message returns an HRESULT
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//
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// PM_SETMAX
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// wParam = 0;
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// lParam = (LPARAM)dwNewMaxValue;
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//
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// Set the new maximum value for the peak meter, i.e. the
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// value that represents the top of the meter range.
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// If this message is not sent, the control defaults to 0xffffffff.
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// The message returns an HRESULT
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//
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// PM_SETCUR
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// wParam = 0;
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// lParam = (LPARAM)dwNewCurValue;
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//
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// Set the new current value for the peak meter, i.e. the
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// value tells the meter where in it's range it should be.
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// If this message is not sent, the control defaults to 0.
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//
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// Sending this message causes the control to call InvalidateRgn
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// on its window, but does not call UpdateWindow. This allows
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// the caller to be lazy or quick about actually redrawing
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// the peak meter.
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// The message returns an HRESULT
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//
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// PM_SETSTEPS
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// wParam = 0;
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// lParam = (LPARAM)dwNewMaxValue;
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//
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// Suggest to the peak meter the number of bars it should
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// display. The bars have a minimum size, so depending on
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// the size of the control, the peak meter may not be able
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// to honor the request.
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// If this message is not sent, the control defaults to 20
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// The message returns an HRESULT
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#define PM_SETMAX WM_USER + 1
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#define PM_SETMIN WM_USER + 2
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#define PM_SETCUR WM_USER + 3
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#define PM_SETSTEPS WM_USER + 4
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class CPeakMeterWndClass
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{
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private:
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HINSTANCE m_hinst;
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public:
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HRESULT Register();
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HRESULT Unregister();
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};
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#endif
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