I would like to recommend the MFC class library and Win32 API in chm format that I found on the Tianqian Technology Forum, which will make it easier for you to find functions and class libraries....
The function is as follows: typedef void (CALLBACK DRVCALLBACK)(HANDLE hdrvr, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2); typedef DRVCALLBACK FAR *LPDRVCALLBACK; typedef DRVCALLBACK *PDRVCALLBACK;...
[i=s] This post was last edited by paulhyde on 2014-9-15 09:28 [/i] The attenuation range is required to reach 60dB, 6dB step adjustable, and the accuracy is at least 1dB. Now I have two solutions: 1....
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1 Introduction
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