lineSetCallParams (Compact 2013)
3/26/2014
This function allows an application to change bearer mode and/or the rate parameters of an existing call.
Syntax
LONG WINAPI lineSetCallParams(
HCALL hCall,
DWORD dwBearerMode,
DWORD dwMinRate,
DWORD dwMaxRate,
LPLINEDIALPARAMS const lpDialParams
);
Parameters
- hCall
Handle to the call whose parameters are to be changed. The application must be an owner of the call. The call state of hCall can be any state except idle or disconnected.
- dwBearerMode
New bearer mode for the call. This parameter uses one and only one of the LINEBEARERMODE.
- dwMinRate
Lower bound for the call's new data rate. The application can accept a new rate as low as this one.
- dwMaxRate
Upper bound for the call's new data rate. This is the maximum data rate the application can accept. If an exact data rate is required, dwMinRate and dwMaxRate should be equal.
- lpDialParams
Pointer to the new dial parameters for the call, of type LINEDIALPARAMS. This parameter can be left NULL if the call's current dialing parameters are to be used.
Return Value
Returns a positive request identifier if the function is completed asynchronously, or a negative error number if an error occurs. The dwParam2 parameter of the corresponding LINE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following table shows the return values for this function.
Value |
Description |
|---|---|
LINEERR_BEARERMODEUNAVAIL |
The bearer mode member in the LINECALLPARAMS structure is invalid, the bearer mode specified in LINECALLPARAMS is not available, or the call's bearer mode cannot be changed to the specified bearer mode. |
LINEERR_NOTOWNER |
The application is not the owner of the call. |
LINEERR_INVALBEARERMODE |
The bearer mode is invalid. |
LINEERR_OPERATIONUNAVAIL |
The operation is invalid. |
LINEERR_INVALCALLHANDLE |
The call handle is invalid. |
LINEERR_RATEUNAVAIL |
The rate is unavailable. |
LINEERR_INVALRATE |
The rate is invalid. |
LINEERR_NOMEM |
Not enough memory is available. |
LINEERR_OPERATIONFAILED |
The operation failed. |
LINEERR_RESOURCEUNAVAIL |
The resource is unavailable. |
LINEERR_UNINITIALIZED |
The parameter is uninitialized. |
LINEERR_INVALCALLSTATE |
The call state is invalid. |
LINEERR_INVALPOINTER |
The pointer is invalid. |
Remarks
This operation is used to change the parameters of an existing call. Examples of its usage include changing the bearer mode and/or the data rate of an existing call.
Requirements
Header |
tapi.h |
Library |
TAPI32.dll |