Quick Info


The mciSendString function sends a command string to an MCI device. The device that the command is sent to is specified in the command string.

MCIERROR mciSendString(

LPCTSTR lpszCommand,

LPTSTR lpszReturnString,

UINT cchReturn,

HANDLE hwndCallback




Address of a null-terminated string that specifies an MCI command string. For more information about the command strings, see Command Strings.


Address of a buffer that receives return information. If no return information is needed, this parameter can be NULL.


Size, in characters, of the return buffer specified by the lpszReturnString parameter.


Handle of a callback window if the "notify" flag was specified in the command string.

Return Values

Returns zero if successful or an error otherwise. The low-order word of the returned doubleword value contains the error return value. If the error is device-specific, the high-order word of the return value is the driver identifier; otherwise, the high-order word is zero. For a list of possible error values, see Constants: MCIERR Return Values.

To retrieve a text description of mciSendString return values, pass the return value to the mciGetErrorString function.

See Also


Software for developers
Delphi Components
.Net Components
Software for Android Developers
More information resources
Unix Manual Pages
Delphi Examples
Databases for Amazon shops developers
Amazon Categories Database
Browse Nodes Database