Check the minimum Windows version before trying to load the CEF binaries

Fix for issue #452

source/uCEFApplicationCore.pas

@@ -367,6 +367,7 @@ type
       function  CheckCEFResources : boolean; virtual;
       {$IFDEF MSWINDOWS}
       function  CheckCEFDLL : boolean; virtual;
+      function  CheckWindowsVersion: boolean; virtual;
       {$ENDIF}
       procedure ShowErrorMessageDlg(const aError : string); virtual;
       function  ParseProcessType : TCefProcessType;
@@ -1205,6 +1206,23 @@ begin
       ShowErrorMessageDlg(FLastErrorMessage);
     end;
 end;
+
+function TCefApplicationCore.CheckWindowsVersion : boolean;
+begin
+  // Chromium 109 requires Windows 10 or later.
+  // https://github.com/salvadordf/CEF4Delphi/issues/452
+  if CheckRealWindowsVersion(10, 0) then
+    Result := True
+   else
+    begin
+      Result            := False;
+      FStatus           := asErrorWindowsVersion;
+      FLastErrorMessage := 'Unsupported Windows version !' +
+                           CRLF + CRLF +
+                           'Chromium requires Windows 10 or later.';
+      ShowErrorMessageDlg(FLastErrorMessage);
+    end;
+end;
 {$ENDIF}
 
 function TCefApplicationCore.CheckCEFLibrary : boolean;
@@ -1223,8 +1241,10 @@ begin
       chdir(GetModulePath);
     end;
 
-  Result := CheckCEFResources
+  Result := CheckCEFResources;
-            {$IFDEF MSWINDOWS}and CheckCEFDLL{$ENDIF};
+  {$IFDEF MSWINDOWS}
+  Result := Result and CheckWindowsVersion and CheckCEFDLL;
+  {$ENDIF}
 
   if FSetCurrentDir then chdir(TempOldDir);
 end;

source/uCEFMiscFunctions.pas

@@ -83,6 +83,7 @@ const
   SHLWAPIDLL  = 'shlwapi.dll';
   NTDLL       = 'ntdll.dll';
   User32DLL   = 'User32.dll';
+  Netapi32DLL = 'Netapi32.dll';
 
 function CefColorGetA(color: TCefColor): Byte;
 function CefColorGetR(color: TCefColor): byte;
@@ -182,6 +183,8 @@ function PathIsURLAnsi(pszPath: LPCSTR): BOOL; stdcall; external SHLWAPIDLL name
 function PathIsURLUnicode(pszPath: LPCWSTR): BOOL; stdcall; external SHLWAPIDLL name 'PathIsURLW';
 function ShutdownBlockReasonCreate(hWnd: HWND; Reason: LPCWSTR): Bool; stdcall; external User32DLL;
 function ShutdownBlockReasonDestroy(hWnd: HWND): Bool; stdcall; external User32DLL;
+function NetServerGetInfo(servername: LPWSTR; level: DWORD; out bufptr: Pointer): DWORD; stdcall; external Netapi32DLL;
+function NetApiBufferFree(Buffer: Pointer): DWORD; stdcall; external Netapi32DLL;
 
 {$IFNDEF DELPHI12_UP}
 const
@@ -227,6 +230,8 @@ procedure UInt64ToFileVersionInfo(const aVersion : uint64; var aVersionInfo : TF
 function  GetExtendedFileVersion(const aFileName : ustring) : uint64;
 function  GetDLLVersion(const aDLLFile : ustring; var aVersionInfo : TFileVersionInfo) : boolean;
 procedure OutputLastErrorMessage;
+function  GetRealWindowsVersion(var aMajor, aMinor: cardinal) : boolean;
+function  CheckRealWindowsVersion(aMajor, aMinor: cardinal) : boolean;
 {$ENDIF}
 
 function SplitLongString(aSrcString : string) : string;
@@ -1515,6 +1520,47 @@ begin
   {$ENDIF}
 end;
 
+function GetRealWindowsVersion(var aMajor, aMinor: cardinal) : boolean;
+type
+  SERVER_INFO_101 = record
+    sv101_platform_id   : DWORD;
+    sv101_name          : LPWSTR;
+    sv101_version_major : DWORD;
+    sv101_version_minor : DWORD;
+    sv101_type          : DWORD;
+    sv101_comment       : LPWSTR;
+  end;
+  PSERVER_INFO_101 = ^SERVER_INFO_101;
+
+const
+  MAJOR_VERSION_MASK = $0F;
+  NO_ERROR           = 0;
+
+var
+  TempBuffer : PSERVER_INFO_101;
+begin
+  Result     := False;
+  TempBuffer := nil;
+
+  if (NetServerGetInfo(nil, 101, Pointer(TempBuffer)) = NO_ERROR) then
+    try
+      aMajor := TempBuffer.sv101_version_major and MAJOR_VERSION_MASK;
+      aMinor := TempBuffer.sv101_version_minor;
+      Result := True;
+    finally
+      NetApiBufferFree(TempBuffer);
+    end;
+end;
+
+function CheckRealWindowsVersion(aMajor, aMinor: cardinal) : boolean;
+var
+  TempMajor, TempMinor: cardinal;
+begin
+  Result := GetRealWindowsVersion(TempMajor, TempMinor) and
+            ((TempMajor > aMajor) or
+             ((TempMajor = aMajor) and (TempMinor >= aMinor)));
+end;
+
 function GetDLLVersion(const aDLLFile : ustring; var aVersionInfo : TFileVersionInfo) : boolean;
 var
   TempVersion : uint64;

source/uCEFTypes.pas

@@ -475,6 +475,7 @@ type
                           asUnloaded,
                           asErrorMissingFiles,
                           asErrorDLLVersion,
+                          asErrorWindowsVersion,
                           asErrorLoadingLibrary,
                           asErrorInitializingLibrary,
                           asErrorExecutingProcess);

update_CEF4Delphi.json

@@ -2,7 +2,7 @@
   "UpdateLazPackages" : [
     {
       "ForceNotify" : true,
-      "InternalVersion" : 479,
+      "InternalVersion" : 480,
       "Name" : "cef4delphi_lazarus.lpk",
       "Version" : "112.2.9"
     }