COMMCONFIG

The COMMCONFIG structure contains information about the configuration state of a communications device.

typedef struct _COMM_CONFIG {
  DWORD dwSize; 
  WORD  wVersion; 
  WORD  wReserved; 
  DCB   dcb; 
  DWORD dwProviderSubType; 
  DWORD dwProviderOffset; 
  DWORD dwProviderSize; 
  WCHAR wcProviderData[1]; 
} COMMCONFIG, *LPCOMMCONFIG; 

Members

dwSize

Specifies the size, in bytes, of the COMMCONFIG structure.

wVersion

Specifies the version number of the COMMCONFIG structure. This parameter can be 1. The version of the provider-specific structure should be included in the wcProviderData member.

wReserved

Reserved; do not use.

dcb

Specifies a device-control block (DCB) structure for RS-232 serial devices. A DCB structure is always present regardless of the port driver subtype specified in the device's COMMPROP structure.

dwProviderSubType

Identifies the type of communications provider, and thus the format of the provider-specific data. For a list of communications provider types, see the description of the COMMPROP structure.

dwProviderOffset

Specifies the offset, in bytes, of the provider-specific data relative to the beginning of the structure. This member is zero if there is no provider-specific data.

dwProviderSize

Specifies the size, in bytes, of the provider-specific data.

wcProviderData

Contains the provider-specific data, if any. This member can be of any size or can be omitted. Because the COMMCONFIG structure may be expanded in the future, applications should use the dwProviderOffset member to determine the location of this member.

Remarks

If the provider subtype is PST_RS232 or PST_PARALLELPORT, the wcProviderData member is omitted. If the provider subtype is PST_MODEM, the wcProviderData member contains a MODEMSETTINGS structure.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Winbase.h; include Windows.h.

See Also

Communications Overview, Communication Structures, DCB, COMMPROP, GetCommProperties, MODEMSETTINGS