MsgCommunicator: Delphi Instant Messaging (IM) SDK
for easy creation of custom messenger system


TMsgClient.IsUserExisting
TMsgClient
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Checks for the user existing.

function IsUserExisting(UserID: Cardinal): Integer;

Description
Call IsUserExisting to determine if user with UserID is already registered on the server or not. IsUserExisting sends command to the server, waits for an answer, and returns MSG_COMMAND_RESULT_TRUE if user with this UserID is registered on the server, or MSG_COMMAND_RESULT_FALSE if it is not registered, or in case of the error occurs, it returns one of the following error codes:

Name
Value
MSG_Error_IsUserExisting_NotConnected   
MSG_Error_IsUserExisting_SendCommandFailed   
MSG_Error_IsUserExisting_ReceiveResultFailed   
MSG_Error_IsUserExisting_InvalidParams   
MSG_Error_IsUserExisting_InvalidServerReply
MSG_Error_IsUserExisting_Failed
60014   
60015   
60016   
60017   
60018   
60019   


If you would like to get user details, you can call GetUserInfo.

Here you can see the full list of the Return Codes and Error Codes of Client Methods.



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