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QuestionText Not Showing Fine Pin
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QuestionScanner - image scanning! Pin
FeRtoll20-May-10 13:10
FeRtoll20-May-10 13:10 
i am trying to convert c# to vb.net of this project!

.NET TWAIN image scanner[^]

i did it and it works on select source, and scan preview but not when i click scan then it throws me error "Arithmetic operation resulted in an overflow." in winmsga.x = CShort(pos)

much of code! Frown | :(

here is what i have done:

TwainLib[^]
Twain[^]
GDIPlusLib[^]
And my form[^]

only two things got errors when i converted code!

first one is:

<StructLayout(LayoutKind.Sequential, Pack:=4)> _
        Friend Structure WINMSG
            Public hwnd As IntPtr
            Public message As Integer
            Public wParam As IntPtr
            Public lParam As IntPtr
            Public time As Integer
            Public x As Integer
            Public y As Integer
        End Structure

and
Private winmsg As WINMSG

so i just renamed it to winmsga maybe i did something wrong here?

and other error was:
Protected Function GetPixelInfo(ByVal bmpptr As IntPtr) As IntPtr
        bmi = New BITMAPINFOHEADER()
        Marshal.PtrToStructure(bmpptr, bmi)

        bmprect.X = InlineAssignHelper(bmprect.Y, 0)
        bmprect.Width = bmi.biWidth
        bmprect.Height = bmi.biHeight

        If bmi.biSizeImage = 0 Then
            bmi.biSizeImage = ((((bmi.biWidth * bmi.biBitCount) + 31) And Not 31) >> 3) * bmi.biHeight
        End If

        Dim p As Integer = bmi.biClrUsed
        If (p = 0) AndAlso (bmi.biBitCount <= 8) Then
            p = 1 << bmi.biBitCount
        End If
        p = (p * 4) + bmi.biSize + CInt(bmpptr)
        Return New (p,IntPtr) 'so i made like this (Return New System.IntPtr(p))
    End Function


can annyone help?

thanks!
FeRtoll Software.net
------------
E-Mail me
WebPage

AnswerRe: Scanner - image scanning! Pin
FeRtoll20-May-10 14:36
FeRtoll20-May-10 14:36 
GeneralRe: Scanner - image scanning! Pin
Wayne Gaylard20-May-10 20:16
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GeneralRe: Scanner - image scanning! Pin
FeRtoll21-May-10 3:53
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Questionanimation? Pin
Adam Wike20-May-10 4:53
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Adam Wike20-May-10 8:28
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FeRtoll20-May-10 13:11
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Questioncontext menu for CD drive Pin
phowarso20-May-10 0:19
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AnswerRe: context menu for CD drive Pin
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AnswerRe: context menu for CD drive Pin
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AnswerRe: context menu for CD drive Pin
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QuestionDate string conversion problem Pin
TheComputerMan19-May-10 15:55
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AnswerRe: Date string conversion problem Pin
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