The Complete ASTA Handheld Architecure is explained On Line at the ASTA Wireless Site. See details for developers at http://www.microsoft.com/pocketpc/developer.asp.

Embedded Visual Basic

Files		Description	Comment
CEComCLient.dll (x86 version for the emulator)		COM Class that implements the ASTA SkyWire Library on.	Version available that compiles under Win32 also! To install it copy it to the emulator and run regsvrce.exe to register it.
eVBSQLClient		Sample eVB application	Shows how to fetch server metadata information and EXEC and Select SQL
Asta ADO Wireless Server		Asta ADO Server to work with sample SkyWire clients	This server uses ADO but ASTA has servers native servers for Oracle, MySQL and just about any other database you can think of.
Asta SkyWire Server		Sample non-Database debug server to see the internals of the ASTA client messages sent to the server.

Embedded Visual C++

Files		Description	Comment
AstaDLL.dll		DLL Library that contains the implementation of the ASTA SkyWire Library that must be loaded on the WinCE device or the emulator.	Make sure it is in the path of any Wince Exe's.
AstaDLL.h		Header file for AstaDLL
AstaSQL		AstaSQL demo.	Simple project that shows how to get tablenames, fieldnames, and execute exec and select SQL against a remote SkyWireServer.
SignCap		Digital Ink example showing how to capture a signature and send it to a remote server and display it.
SkyWireTestClient		Shows the built in abilities of SkyWire Servers and the client including signature capture with it being displayed at the server.	Emulator version   ARM version for IPAQ   SH3 version for HP Journada   MIPS version   SkyWire Server
Delphi SkyWire Test Client		Delphi Win32 client that can be run against the same server and implements the SkyWire client abilities through the AstaServerSocket.OnCodedParamList call.

Server Side

The TAstaPDAServerSocket, which descends from the TAstaServerSocket, provides support for Palm, WinCE and Linux PDA Clients. Below is a description of the additional events available for the TAstaPDAServerSocket.

There are several additional events coded on the AstaPDAServerSocket in order to support remote PDA Clients.

OnPdaParamList

This is the most important event as all the SendParamList calls from PDA clients will flow through this event. The MsgToken comes from the remote Client call and if there is any kind of Error on the server just send a non-zero value back in PdaSendParamList.

procedure TForm1.AstaServerSocket1PDAParamList(Sender: TObject;
ClientSocket: TCustomWinSocket; PDAid, MsgID, MsgToken: Integer;
P: TAstaParamList);
var
  Error:Integer;
begin
  Error:=0;
  case MsgToken of
    1001: Error:=DoPDAServerTime(ClientSocket, P);
    1003: Error:=DoPalmSQLSelect(ClientSocket, P);
    1004: Error:=DoPDATables(ClientSocket, P);
    1005: Error:=DoPalmExecSQL(Clientsocket,p);
    1006: Error:=DoPDAFields(ClientSocket, P);
    1010: Error:=DoPalmMultiSQLSelect(ClientSocket, P);
    1011: Error:=DoPDASelect(ClientSocket, P);
    1012: Error:=DoPalmExecSQLParamList(ClientSocket,p);
    else Error:=DoPDAServerTime(ClientSocket, P);
  end;
  AstaServerSocket1.PDASendParamList(Error, ClientSocket, P);
end;


Client Side Example

Below is a small code example of creating an AstaConnection and connecting to a remote Asta SkyWire server from the Digital Ink demo client.

AstaHandle Params = AstaParamLstCreate();

AstaParamLstSetLongInt(Params, 0, total_pixels, TEXT("Total"));
AstaParamLstSetBlob(Params, 1, tlist, total_pixels * 3, TEXT("Sequence"));

AstaHandle conn = AstaClConvCreate();

if (conn)
  {
  if (AstaClConvOpenConnection(conn, AddressBuf, Port))
    {
    bool sent = AstaClConvSendParamList(conn, MsgID, Params);
    AstaParamLstDestroy(Params);

    if (!sent)
      {
      int i = AstaClConvGetLastError(conn);
      MessageBox(0, TEXT("Failed to send data"), NULL, 0);
      }
    AstaClConvReceiveStream(conn, &tlist, &tlsize);
    AstaClConvCloseConnection(conn);
    }
  else
    {
    AstaParamLstDestroy(Params);
    MessageBox(0, TEXT("Failed to connect to server"), NULL, 0);
    }
  }
AstaClConvDestroy(conn);