Hi,

My VS 2005 VB app reads a binary file that was created by a VS 2005 VC++
WinCE app.  The VC++ app writes the following structure to the file.

typedef struct {
    short    ID;
    TCHAR    Num[10];
} PARTS_STRUCT;

In my VB code I read the file with this code...

    <StructLayout(LayoutKind.Sequential, Pack:=1)> _
    Public Structure Parts_Struct
        Public ID As Short
        <MarshalAs(UnmanagedType.ByValTStr, SizeConst:=10)> _
        Public Num As String
    End Structure

        Dim Parts As New Parts_Struct
        Dim fs As New FileStream(FName, FileMode.Open, FileAccess.Read)
        Dim br As New BinaryReader(fs)
        Parts.ID = br.ReadInt16()
        Parts.Num = br.ReadChars(10)

In the binary file, the Num fiedl contains the text "123".

When I run the code, the ID field is Ok, but I only get the 1st letter if
the "Num" field ("0")..

If I change the Num field type to Char(), it gets filled with this...
Num[0] = "1"
Num[1] = Nothing
Num[2] = "2"
Num[3] = Nothing
Num[4] = "3"
Num[5] = Nothing

I also tried changing the "CharSet" parameter in the Structlayout() to Ansi
and Unicode, bit still get the same results.

Looks like I am close, but still missing something.
Can anyone point me in the right direction?

RML

RML wrote:

Show quoteHide quoteThe file is binary - you can't read characters, you have to read bytes
and then convert them into a string.

T

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