Title: How to obtain DLL-specific version information
// DLLVERSIONINFO structure
type
PDLLVerInfo=^TDLLVersionInfo;
TDLLVersionInfo=Record
cbSize, // Size of the structure, in bytes.
dwMajorVersion, // Major version of the DLL
dwMinorVersion, // Minor version of the DLL
dwBuildNumber, // Build number of the DLL
dwPlatformID: DWord; // Identifies the platform for which the DLL was built
end;
var
DllGetVersion: function(dvi: PDLLVerInfo): PDLLVerInfo; stdcall;
function GetDllVersion(DllName: string; var DLLVersionInfo: TDLLVersionInfo): Boolean;
var
hInstDll: THandle;
p: pDLLVerInfo;
begin
Result := False;
// Get a handle to the DLL module.
hInstDll := LoadLibrary(PChar(DllName));
if (hInstDll = 0) then Exit;
// Return the address of the specified exported (DLL) function.
// Adresse der Dll-Funktion ermitteln
@DllGetVersion := GetProcAddress(hInstDll, 'DllGetVersion');
// If the handle is not valid, clean up an exit.
// Wenn das Handle ung¨¹ltig ist, wird die Funktion verlassen
if (@DllGetVersion) = nil then
begin
FreeLibrary(hInstDll);
Exit;
end;
new(p);
try
ZeroMemory(p, SizeOf(p^));
p^.cbSize := SizeOf(p^);
// Call the DllGetVersion function
DllGetVersion(p);
DLLVersionInfo.dwMajorVersion := p^.dwMajorVersion;
DLLVersionInfo.dwMinorVersion := p^.dwMinorVersion;
@DllGetVersion := nil;
Result := True;
finally
dispose(P);
end;
// Free the DLL module.
FreeLibrary(hInstDll);
end;
Usage Example to get version info from comctl32.dll
procedure TForm1.Button1Click(Sender: TObject);
var
DLLVersionInfo: TDLLVersionInfo;
begin
if not GetDllVersion('comctl32.dll',DLLVersionInfo) then
begin
DLLVersionInfo.dwMajorVersion := 4;
DLLVersionInfo.dwMinorVersion := 0;
end;
with DLLVersionInfo do
ShowMessage(Format('ComCtl Version: %d.%d / Build: %d',[dwMajorVersion, dwMinorVersion, dwBuildNumber]))
end;