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I am populating an ImageMan control in a VB6 application via a webservice call that returns a byte array.  I have the conversion of a byte array to a global memory block, via GlobalAlloc and CopyMemory, working just fine.  My question is, do I have to explicitly free the allocated memory if I change images in the ImageMan control or does the control free the resource once it has been assigned?

Thanks for any information,

Fritz

Hi,

 
Once the image data is in the control it will free the memory. Can you show me exactly how you are getting the data in just so we can be sure you are leaking anything ?

The parameters to GetImage are normally encrypted state data for the user and numeric references, they are unimportant to the client side of the process:

    Dim svcSOAP As MSSOAPLib.SoapClient
    Set svcSOAP = New MSSOAPLib.SoapClient
        
    Dim url As String
    url = "http:\\devfritzl\TestService\ImageService.asmx?wsdl"
    svcSOAP.mssoapinit url
    
    Dim imgArray() As Byte
    imgArray = svcSOAP.GetImage("", -1, -1)  ' returns TIFF as byte array from server
    
    Dim isize As Long
    isize = UBound(imgArray) + 1
    Dim hMem As Long
    Dim lpMem As Long
    hMem = GlobalAlloc(GPTR, isize)
    lpMem = GlobalLock(hMem)
    CopyMemory ByVal lpMem, imgArray(0), isize
    GlobalUnlock (hMem)
    
    ImageMan1.AutoScale = Stretch
    ImageMan1.ImageDataSize = isize
    ImageMan1.hImageData = lpMem
    ImageMan1.Refresh