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mciSendString 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.
VB4-32,5,6
Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Long, ByVal hwndCallback As Long) As Long |
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Operating Systems Supported |
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Requires Windows NT 3.1 or later; Requires Windows 95 or later |
- lpszCommand
Address of a null-terminated string that specifies an MCI command string. For more information about the command strings, see Command Strings.
- lpszReturnString
Address of a buffer that receives return information. If no return information is needed, this parameter can be NULL.
- cchReturn
Size, in characters, of the return buffer specified by the lpszReturnString parameter.
- hwndCallback
Handle of a callback window if the “notify” flag was specified in the command string. |
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. |
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