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The following table shows Visual Basic data types that correspond to DTWAIN data types (32-bit applications).
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DTWAIN Data Type
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VB .NET Type
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DTWAIN_ARRAY
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Integer
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DTWAIN_CALLBACK_PROC
|
Delegate
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DTWAIN_BOOL
|
Integer
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DTWAIN_FLOAT
|
Double
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DTWAIN_FRAME
|
Integer
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DTWAIN_OCRENGINE
|
Integer
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DTWAIN_PDFTEXTELEMENT
|
Integer
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DTWAIN_RANGE
|
Integer
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DTWAIN_SOURCE
|
Integer
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HANDLE
|
Integer
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LONG, DTWAIN_LONG
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Integer
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DTWAIN_LONG64
|
Long
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DWORD
|
UInteger
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LPCTSTR
|
String
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LPDTWAIN_ARRAY
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Integer (passed ByRef)
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LPDTWAIN_FLOAT
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double (passed ByRef)
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LPDWORD
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UInteger (passed byRef)
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LPLONG
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Integer (passed ByRef)
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LPTSTR
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String
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LPVOID
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Integer (passed ByRef)
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TWAIN_IDENTITY
|
Integer
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For 64-bit applications, the VB.NET/2005/2008/2010 types are as follows:
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DTWAIN Data Type
|
VB .NET Type
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DTWAIN_ARRAY
|
Long
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DTWAIN_CALLBACK_PROC
|
Delegate
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DTWAIN_BOOL
|
Long
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DTWAIN_FLOAT
|
Double
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DTWAIN_FRAME
|
Long
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DTWAIN_OCRENGINE
|
Long
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DTWAIN_PDFTEXTELEMENT
|
Long
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DTWAIN_RANGE
|
Long
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DTWAIN_SOURCE
|
Long
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DWORD
|
UInteger
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HANDLE
|
Long
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LONG, DTWAIN_LONG
|
Integer
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DTWAIN_LONG64
|
Long
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LPCTSTR
|
String
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LPDTWAIN_ARRAY
|
Long (passed ByRef)
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LPDTWAIN_FLOAT
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double (passed ByRef)
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LPDWORD
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UInteger (passed ByRef)
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LPLONG
|
Integer (passed ByRef)
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LPTSTR
|
String
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LPVOID
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Integer (passed ByRef)
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TWAIN_IDENTITY
|
Long
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