>Im trying to use the foll code in VFP from VB. Is the VFP translation right and am I using the Struct class correctly..
>
>
>****VB Setup
>Public Declare Sub RUNENGINE Lib "Endev32.dll" (ByRef request As restruct, ByRef result As restruct)
>
>Public Type restruct ' Defining restruct to be a byte array
>temp(1 To 1024) As Byte
>End Type
>
>Public result As restruct ' result buffer is a byte array
>Public request As restruct ' request buffer is a byte array
>
>*******************************************************************************************
>** VFP 5.0 - Setup
>Set ClassLib to Struct
>Declare String RUNENGINE in Endev32.dll ;
> String @ResultArray,;
> String @RequestArray
>
>

There's no need to use STRUCT here; just init two variables cRequest and cResult and make them 1000 characters long; a VFP string is essentially a byte array from the perspective of an API; simply address members as

SUBST(variable name,array element member number,1), and pass them by reference as in your example:

x=RUNENGINE(@lcResult,@lcRequest)

You can use STUFF() or concatenation to build the array for you.

>*** Open Database in VB Code
>' Open database
>
>Private Sub Open_database_Click()
>
>' text contains the command O along with the facet name selected from the ListBox
>' plus the open mode (2) and ^Z as a terminator
>Text = "O" & Left(List2.Text, 8) & Chr(2) & Chr(26)
>
>' Copy ASCII characters to a byte array
>Call SetRequest(request, 1, Text)
>
>' Set the size of the results block to 1024 bytes
>result.temp(1) = 0
>result.temp(2) = 4
>
>' Call database engine
>Call RUNENGINE(result, request)
>
>' Display the status code for the O command
>Text3.Text = result.temp(3)
>*****
>** Open Database in VFP
>lcText="OWEBK"+CHR(2)+chr(26)
>loResult = CreateObject("Result")
>loRequest = CreateObject("Request")
>
>SetResult(loRequest,1,lcText)
>
>loResult.ResultArray[1]=0
>loResult.ResultArray[2]=4
>
>lcResult=loresult.GetString()
>lcRequest = lorequest.GetString()
>x=RUNENGINE(@lcResult,@lcRequest)
>? loresult.ResultArray[3]
>
>Define class Result as Struct
> Dime ResultArray[1024]
> cMembers = "b:ResultArray"
>EndDefine
>Define class Request as Struct
> Dime RequestArray[1024]
> cMembers = "b:RequestArray"
>EndDefine
>
>** VFP 5.0 Method
>Function Setresult
>lparameters toStruct,tStart,tString
>*** Fill passed Array
>
>local x,i
>
>x=len(allt(tstring))
>For i = 1 to x
> tostruct.RequestArray[i]=ASC(SUBSTR(tString,i,1))
>Endfor
>
>** VB Method
>** Generate request byte array for transfer to DLL
>Public Sub SetRequest(request As restruct, Start As Long, text As String)
>
>X = Len(text)
>For i = 1 To X
> ' Copy ASCII character to byte array
> request.temp(i) = Asc(Mid(text, i, i + 1))
>Next i
>End Sub