Plug the microphone into the "Mic" jack on your sound card. Launch Mixcraft. Click the "Record Yourself or Your Band" icon.
Click "File," then "Preferences." Click "Sound Device" in the left-hand column, then click the "Wave" radio button. Select the microphone from the "Default Recording Device (Input)" drop-down menu and click "OK."
Click the "Arm" button on the channel labeled "1 Audio Track." Click the "Record" button and speak or sing into the mic. Adjust the volume slider on the audio channel to change the volume of the recorded sound.
Click the "Stop" button when you're finished recording. Click "Play" to listen to the recorded audio. Repeat the process for any other audio tracks you want to record.