LInet::SendSetRectCmd

#include " ltwrappr.h "

L_INT LInet::SendSetRectCmd (plRemoteComp, uCommandID, uWindowID, nType, nLeft, nTop, nWidth, nHeight)

LInet * plRemoteComp;	/* instance of a remote computer */
L_UINT uCommandID;	/* command id */
LONG_PTR uWindowID;	/* window id */
RECTTYPE nType;	/* rectangle type */
L_INT nLeft;	/* horizontal position */
L_INT nTop;	/* vertical position */
L_INT nWidth;	/* vertical position */
L_INT nHeight;	/* height */

Sends a set rectangle 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 receive the command.
nType	Type of rectangle to set. For possible values, refer to RECTTYPE.
nLeft	X coordinate of the origin of the display rectangle.
nTop	Y coordinate of the origin of the display rectangle.
nWidth	Width of the display rectangle.
nHeight	Height of the display rectangle.

Returns

SUCCESS	This function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

The remote computer should respond by calling LInet::SendSetRectRspin its LInet::CommandCallBackfunction.

The LInet::CommandCallBackfunction will receive the uWindowID, nType, nLeft, nTop, nWidth and nHeight information in the pParams parameter. The uWindowID information will be in pParams[0]. The nType information will be in pParams[1], and so forth.

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

This command is only beneficial to windows that have a bitmap associated with them.

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::SendSetRectRsp, 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 create a window.
//It is assumed that:
//1.  the network as been started (LInet::StartUp()) 
//2.  a connection has been established with a remote server (LInet::m_Inet.Connect())
class LUserNet6 : 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);
};
LUserNet6 m_ClientInet;
L_INT LInet__SendSetRectCmdExample(LInet * pInetRemoteServer, L_UINT uWindowID)
{
   L_INT nRet = SUCCESS;
   nRet = m_ClientInet.SendSetRectCmd(
      pInetRemoteServer,
      0,
      uWindowID, 
      RECT_SRCALL,
      30,              //left
      30,              //top
      80,              //width
      80               //height
      );
   if(nRet != SUCCESS && nRet != ERROR_DATA_QUEUED)
      return nRet;
   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
L_INT LUserNet6::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_SET_RECT:
         {
            //Add your code for zooming
         } 
         break;
         default: 
         {
            return nStatus; 
         }
      }
   }
   return nStatus;
}