LInet::SendCloseWinCmd

#include " ltwrappr.h "

L_INT LInet::SendCloseWinCmd (plRemoteComp, uCommandID, uWindowID)

LInet * plRemoteComp;

/* instance of a remote computer */

L_UINT uCommandID;

/* command id */

LONG_PTR uWindowID;

/* window id */

Sends a close window command to a remote computer. This function is only available in the Internet toolkit.

Parameter

Description

plRemoteComp

Instance of the remote computer to which the command will be sent.

uCommandID

Command ID. Each command sent by a member of a connection should have a unique ID. Since a member of a connection may send several commands, this ID allows that member to identify when a specific command request has been completed.

uWindowID

The id of the window to close.

Returns

SUCCESS

This function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

The remote computer should respond by calling LInet::SendCloseWinRsp in its LInet::CommandCallBack function.

The LInet::CommandCallBackfunction will receive the uWindowID information in the pParams parameter. The uWindowID information will be in pParams[0].

To process responses to commands, a class must be derived from LInet and the LInet::ResponseCallBackmember function must be overridden.

Required DLLs and Libraries

LTNET

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:

LInet::SendCloseWinRsp, LInet::ResponseCallBack, LInet::CommandCallBack, Class Members

Topics:

Sending Commands and Responses

 

A Client Server Diagram: Sending Commands and Responses

Example

//This example sends a message to a remote connection to close a window

//It is assumed that:

//1. m_Inet and m_pInetRemoteServer are an object of the class LInet.

//2. the network as been started (LInet::StartUp())

//3. a connection has been established with a remote server (LInet::m_Inet.Connect())

//4. UpdateStatusbar() is a function that displays a message in the status bar

//6. m_uWindowID is a window id that is received in the LInet::ResponseCallBack() as a result

// of a call to m_Inet.SendCreateWinCmd()

enum
{
   CMD_FLIP = CMD_USER_CUSTOM,
   CMD_GET,
   CMD_REVERSE,
   CMD_90,
   CMD_180,
   CMD_SHEAR,
   CMD_RESIZE,
   CMD_POSTERIZE,
   CMD_NOISE,
   CMD_OILIFY,
   CMD_RESOLUTION,
   CMD_INVERT,
   CMD_CONTRAST,
   CMD_SATURATION,
   CMD_GAMMA,
   CMD_LOADPATH
};
class LUserNet : public LInet
{
public:
   L_INT  OnConnect(LInet *plConnection, L_INT nError)
   {
      L_INT   nRet = SUCCESS;
      L_CHAR  *pszHostName;
      L_TCHAR strMsg[L_MAXPATH];
      
      if(nError != SUCCESS)
      {
         wsprintf(strMsg, _T("Error[%d]: OnConnect"), nRet);
         MessageBox(NULL, strMsg, 0 , 0);
         return nError;
      }
      
      // Get the remote computer name   
      if ((pszHostName = plConnection->GetHostName(HOST_NAME_IP)) == NULL)      
         return FAILURE;   
      wsprintf(strMsg, _T("OnConnect: Connected to %hs"), (LPTSTR)pszHostName);
      MessageBox(0, strMsg, 0, 0);
      this->SendLoadCmd(plConnection, CMD_LOAD, TEXT("E:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\IMAGE1.CMP"));
      return nRet;
   }
   L_INT CommandCallBack (LInet * plConnection,
                          CMDTYPE     uCommand,
                          L_UINT      uCommandID,
                          L_INT       nError,
                          L_UINT      uParams, 
                          pPARAMETER  pParams, 
                          L_UINT      uExtra,
                          L_CHAR*pExtra);
};
LUserNet m_ClientInet;
L_INT LInet__SendCloseWinCmdExample(LInet *pInetRemoteServer, L_UINT uWindowID)
{
   m_ClientInet.SendCloseWinCmd(
               pInetRemoteServer,
               1000,
               uWindowID
               );
   return SUCCESS;
}
//The CommandCallBack() is processed on the server
//To process the commands sent to the computer, you must:
//1. Derive a class from LInet
//2. Override the CommandCallBack member function
//
//Assume that 
//1. m_Inet is an object of the class CMyNet (derived from LInet).
//2. the network as been started (LInet::StartUp()) 
//3. a connection has been established with a remote client
//4. UpdateStatusbar() displays a message in the status bar
//5. m_BitmapList maintains a list of LBitmapWindow objects
L_INT LUserNet::CommandCallBack (LInet * plConnection,
                              CMDTYPE     uCommand,
                              L_UINT      uCommandID,
                              L_INT       nError,
                              L_UINT      uParams, 
                              pPARAMETER  pParams, 
                              L_UINT      uExtra,
                              L_CHAR*pExtra)
{
   UNREFERENCED_PARAMETER(pExtra);
   UNREFERENCED_PARAMETER(uExtra);
   UNREFERENCED_PARAMETER(uParams);
   UNREFERENCED_PARAMETER(pParams);
   UNREFERENCED_PARAMETER(uCommandID);
   UNREFERENCED_PARAMETER(plConnection);
   L_INT nStatus = ERROR_FEATURE_NOT_SUPPORTED;
   if(nError != SUCCESS)
      nStatus = ERROR_TRANSFER_ABORTED;
   else
      switch(uCommand)
   {
      case CMD_CLOSE_WIN:
         {
            //Add your code here
         } 
         break;
      default: 
         {
            return nStatus; 
         }
   }
   return nStatus;
}