I was have one program which control speaker and microphone volume level. First you must choose driver (ex. Realtek Sound - for sound control). Then track bar appear and I can control level. Now I again need this code. Please help. P.S. Sorry for my english, its bad 
I have this project, but now they have some errors which I cant fix. View attachment.
I have this project, but now they have some errors which I cant fix. View attachment.
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