uwinImports: some more imports

uwinImports.pas

@@ -16,7 +16,15 @@ uses
 
 const
   shell32 = 'shell32.dll';
+  shlwapi = 'shlwapi.dll';
 
+{%REGION System }
+const
+  SECURITY_NT_AUTHORITY: SID_IDENTIFIER_AUTHORITY = (Value: (0, 0, 0, 0, 0, 5));
+
+function CheckTokenMembership(TokenHandle: HANDLE; SidToCheck: PSID; var IsMember: BOOL): BOOL; stdcall; external advapi32;
+
+{%ENDREGION}
 
 {%REGION Filesystem }
 
@@ -75,7 +83,6 @@ const
 
 {%ENDREGION}
 
-
 {%REGION ShellAPI }
 {$if FPC_FULLVERSION < 030101}
 // only needed in versions where 0029036 is not fixed (before r32452)
@@ -87,6 +94,29 @@ function  SHOpenFolderAndSelectItems(pidlFolder:LPCITEMIDLIST;cidl:UINT; apidl:
 // FIXME: temporary until 0028760 is fixed in FPC
 function SHBindToParent2(pidl:LPCITEMIDLIST; constref riid:TREFIID; var ppv:Pointer; var ppidlLast:LPCITEMIDLIST):HRESULT;StdCall;external External_library name 'SHBindToParent';
 
+type
+  PHICON = ^HICON;
+
+function ExtractIconEx(lpszFile: LPCSTR; nIconIndex: Integer; phIconLarge, phIconSmall: PHICON; nIcons: UINT):UINT; external shell32 name 'ExtractIconExA';
+function ExtractIconExW(lpszFile: LPCWSTR; nIconIndex: Integer; phIconLarge, phIconSmall: PHICON; nIcons: UINT):UINT; external shell32 name 'ExtractIconExW';
+
+function PathUnExpandEnvStrings(lpSrc:LPCSTR; lpDst:LPSTR; nSize:DWORD):BOOL; external shlwapi name 'PathUnExpandEnvStringsA';
+
+{%ENDREGION}
+
+{%REGION Helper - System }
+(*
+Routine Description: This routine returns TRUE if the caller's
+process is a member of the Administrators local group. Caller is NOT
+expected to be impersonating anyone and is expected to be able to
+open its own process and process token.
+Arguments: None.
+Return Value:
+ TRUE - Caller has Administrators local group.
+ FALSE - Caller does not have Administrators local group. --
+*)
+function IsUserAdmin: BOOL;
+function IsWow64: Boolean;
 {%ENDREGION}
 
 {%REGION Helper - Filesystem }
@@ -100,7 +130,7 @@ function GetFileCompressedSize(const aFileName: string; out FSize: QWord): Boole
 function GetFileIndex(const aFilename: string; out FIndex: QWORD): boolean;
 {%ENDREGION}
 
-{%REGION Helpr - ShellAPI }
+{%REGION Helper - ShellAPI }
 function GetConfigLocation(const aPortable, aRoaming: boolean; aProgramSubdir: String): string;
 
 function OpenFolderAndSelectFile(const FileName: string): boolean;
@@ -111,6 +141,51 @@ implementation
 uses
   windirs;
 
+function IsWow64: Boolean;
+type
+  TIsWow64Process = function( // Type of IsWow64Process API fn
+    Handle: Windows.THandle; var Res: Windows.BOOL
+  ): Windows.BOOL; stdcall;
+var
+  IsWow64Result: Windows.BOOL;      // Result from IsWow64Process
+  IsWow64Process: TIsWow64Process;  // IsWow64Process fn reference
+begin
+  IsWow64Result:= false;
+  // Try to load required function from kernel32
+  IsWow64Process := TIsWow64Process(Windows.GetProcAddress(
+    Windows.GetModuleHandle(kernel32), 'IsWow64Process'
+  ));
+  if Assigned(IsWow64Process) then
+  begin
+    // Function is implemented: call it
+    if not IsWow64Process(
+      Windows.GetCurrentProcess, IsWow64Result
+    ) then
+      raise SysUtils.Exception.Create('IsWow64: bad process handle');
+    // Return result of function
+    Result := IsWow64Result;
+  end
+  else
+    // Function not implemented: can't be running on Wow64
+    Result := False;
+end;
+
+function IsUserAdmin: BOOL;
+var
+  NTAuthority: SID_IDENTIFIER_AUTHORITY;
+  AdministratorsGroup: PSID;
+begin
+  Result:= false;
+  NTAuthority:= SECURITY_NT_AUTHORITY;
+  AdministratorsGroup:= nil;
+  Result:= AllocateAndInitializeSid(@NTAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0,0,0,0,0,0, AdministratorsGroup);
+  if Result then begin
+    if not CheckTokenMembership(0, AdministratorsGroup, Result) then
+      Result:= false;
+    FreeSid(AdministratorsGroup);
+  end;
+end;
+
 function GetVolumePathName(const aFileName: string): string;
 begin
   SetLength(Result, MAX_PATH + 2);