Sending Command Strings

Windows provides two functions to send command strings to devices and to query devices for error information:

  • The mciSendString function sends a command string to an MCI device.

  • The mciGetErrorString function returns the error string corresponding to an error number.

The mciSendString function returns zero if successful. If the function fails, the low-order word of the return value contains an error code. You can pass this error code to mciGetErrorString to get a text description of it.

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