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static extern bool GetOpenFileName([In, Out] OpenFileName ofn);

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Private Shared Function GetOpenFileName(<[In], Out> ByVal ofn As OpenFileName) As Boolean

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        'BOOL GetOpenFileName(LPOPENFILENAME lpofn);

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        Declare Auto Function GetOpenFileName Lib "Comdlg32.dll" ( _

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        If LibWrap.GetOpenFileName(ofn) Then

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gcc -Wall -Wl,--enable-stdcall-fixup -mnop-fun-dllimport -mwindows getopenfilename.c

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#define GetOpenFileName GetOpenFileNameA

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// below adapted from: https://www.daniweb.com/software-development/cpp/code/217307/a-simple-getopenfilename-example

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    int i = GetOpenFileName(&ofn);

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Documentation

[GetOpenFileName] on MSDN

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    'BOOL GetOpenFileName(LPOPENFILENAME lpofn);

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Summary

OpenFileName- Structure for GetOpenFileName

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    ''' When the GetOpenFileName or GetSaveFileName function returns successfully,

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    ''' The GetOpenFileName and GetSaveFileName functions return FALSE if the buffer is

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    ''' The default extension. GetOpenFileName and GetSaveFileName append this extension to the file name if the user fails to type an extension.