InetHttpSendForm example for Visual Basic

Take the following steps to use HTTP features to your application:

1.	Start Visual Basic.
2.	Add the LEAD Raster Object Library and LEAD Raster Variant Object Library to your project.
	For VB5: On the Project pull-down menu, use the References option, and select the LEAD Raster Object Library (14.5).
	For VB5: On the Project pull-down menu, use the References option, and select the LEAD Raster Variant Object Library (14.5).
3.	Add the LEAD RasterIO Object Library to your project.
	For VB5: On the Project pull-down menu, use the References option, and select the LEAD RasterIO Object Library (14.5).
4.	Add the LEAD RasterHTTP Object Library to your project.
	For VB5: On the Project pull-down menu, use the References option, and select the LEAD RasterHTTP Object Library (14.5).
5.	Add the following lines to the General Declarations section at the top of your form's code:

Dim HTTPObj As LEADRasterHTTP
Dim RasterObj As LEADRaster
Dim IOObj As LEADRasterIO

6.	Add a command button to your form and name it as follows:
	Name	Caption
	SendForm	Send Form
7.	Add the following initialization code to the main form's Load procedure. In online help, you can use the Edit pull-down menu to copy the block of code.

Private Sub Form_Load()
   Set HTTPObj = CreateObject("LEADRasterHTTP.LEADRasterHTTP")
   Set RasterObj = CreateObject("LEADRaster.LEADRaster")
   Set IOObj = CreateObject("LEADRasterIO.LEADRasterIO")

   HTTPObj.EnableMethodErrors = False

End Sub

8.	Code the SendForm button's click procedure as follows:

Private Sub SendForm_Click()
   Dim nRet As Integer, nStatus As Long
   nRet = HTTPObj.InetHttpConnect ("demo.leadtools.com", 80, "", "")

   If nRet = 0 Then
      nRet = HTTPObj.InetHttpOpenRequest (HTTP_RQST_POST, "/com/tutorial/http/form.asp ", "", "HTTP/1.0")
      If nRet = 0 Then
         HTTPObj.InetHttpFormValueCount = 2
         HTTPObj.InetHttpFormValues (0).pszName = "email"
         HTTPObj.InetHttpFormValues(0).pszValue = "myemail@somewhere.com"
         HTTPObj.InetHttpFormValues(1).pszName = "name"
         HTTPObj.InetHttpFormValues(1).pszValue = "First Last"
         nRet = HTTPObj.InetHttpSendForm ()
         If nRet <> 0 Then
            MsgBox "Error Sending Form", vbOKOnly + vbExclamation, "Error"
            HTTPObj.InetHttpCloseRequest
            HTTPObj.InetHttpDisconnect
            Exit Sub
         End If
         HTTPObj.InetHttpGetServerStatus nStatus
         If nStatus = HTTP_STATUS_OK Then
            Dim strResponse As String
            strResponse = HTTPObj.InetHttpGetResponse
            Open "c:\output.htm" For Binary As #1
            Put #1, , strResponse
            Close #1
         Else
            MsgBox "Problem With Server", vbOK + vbExclamation, "Error"
         End If
         HTTPObj.InetHttpCloseRequest
         HTTPObj.InetHttpDisconnect
      End If
   End If
End Sub

9.	Run your program to test it.
10.	Save the project to use as a starting point for other tutorials.