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Old 04-29-2020, 08:41
phroyt phroyt is offline
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Lightbulb Reading File Version from Memory

I faced a strange problem:
GetFileVersionInfoSize And GetFileVersionInfo return nothing from an .EXE file with a valid RT_VERSION.

Using Resource Hacker the Record List appear as italic.
What I don't know what means, But the record is there.

By the way, my goal is to determinate the version of running executable that loaded my Proxy DLL.

The workaround was read the RT_VERSION resource using HInstance value from already loaded data into memory.

Code:
function FileVersion(Module: HINST = 0): String;
var
  verblock:PVSFIXEDFILEINFO;
  versionMS,versionLS:cardinal;
  verlen:cardinal;
  rs:TResourceStream;
  m:TMemoryStream;
  p:pointer;
  s:cardinal;
begin
  m:=TMemoryStream.Create;
  try
    if Module = 0 then
      Module := HInstance;

    rs:=TResourceStream.CreateFromID(Module,1,RT_VERSION);
    try
      m.CopyFrom(rs,rs.Size);
    finally
      rs.Free;
    end;
    m.Position:=0;
    if VerQueryValue(m.Memory,'\',pointer(verblock),verlen) then
      begin
        VersionMS:=verblock.dwFileVersionMS;
        VersionLS:=verblock.dwFileVersionLS;
        Result:=
          IntToStr(versionMS shr 16)+'.'+
          IntToStr(versionMS and $FFFF)+'.'+
          IntToStr(VersionLS shr 16)+'.'+
          IntToStr(VersionLS and $FFFF);
      end;
    if VerQueryValue(m.Memory,PChar('\\StringFileInfo\\'+
      IntToHex(GetThreadLocale,4)+IntToHex(GetACP,4)+'\\FileDescription'),p,s) or
        VerQueryValue(m.Memory,'\\StringFileInfo\\040904E4\\FileDescription',p,s) then //en-us
          Result:=PChar(p)+' '+Result;
  finally
    m.Free;
  end;
end;
The Module param can be omitted to load my DLL HInstace value, or can give the value using
Code:
GetModuleHandle(nil);
to find Main Module (EXE) HInstance.
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