Получить специфическую для DLL информацию о версии

Советы » DLL » Получить специфическую для DLL информацию о версии

{*************************** 
** DllGetVersion Function ** 

***************************}

 { 
  Implemented by many of the Microsoft® Windows® Shell dynamic-link libraries (DLLs) to 
  allow applications to obtain DLL-specific version information. 
}


 { 
  Using DllGetVersion to Determine the Version Number 
  Starting with version 4.71, the Shell and common controls DLLs, among others, 
  began exporting DllGetVersion. 
  This function can be called by an application to determine which DLL 
  version is present on the system. It returns a structure that contains version information. 

  Note  DLLs do not necessarily export DllGetVersion. Always test for it 
  before attempting to use it. 
  For systems earlier than Windows 2000, DllGetVersion returns a DLLVERSIONINFO structure 
  that contains the major and minor version numbers, the build number, 
  and a platform identifier (ID). 
  For Windows 2000 and later systems, DllGetVersion might instead return a 
  DLLVERSIONINFO2 structure. This structure contains the QFE number that identifies 
  the service pack and provides a more robust way to compare version numbers than DLLVERSIONINFO. 
  Because the first member of DLLVERSIONINFO2 is a DLLVERSIONINFO structure, 
  the new structure is backward-compatible. 
}

 // 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. // das Handle zum DLL Modul ermitteln. 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 ungьltig 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 // Die DllGetVersion() Funktion aufrufen DllGetVersion(p); DLLVersionInfo.dwMajorVersion := p^.dwMajorVersion; DLLVersionInfo.dwMinorVersion := p^.dwMinorVersion; @DllGetVersion := nil

; Result := True; finally

dispose(P); end

; // Free the DLL module. // Dll wieder freigeben. FreeLibrary(hInstDll); end

; // Example to get version info from comctl32.dll // Beispiel, um von comctl32 Versions/Informationen zu erhalten 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

;

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