System Delphi

Title: How to add a true type font to the system
Question: Add entries to the registry and inform the system...
Answer:
To install a font on the system you have to copy the font-file into 'Windows\Fonts' and add a key in the registry:
'Software\Microsoft\Windows\CurrentVersion\Fonts'
This key points to the font-file. Afterwards the API function 'AddFontRecource' has to be executed. Finally the system has to be notified with a broadcast message.
uses Registry;
procedure TForm1.Button1Click(Sender: TObject);
var
hReg: TRegistry;
hBool : bool;
begin
CopyFile('C:\DOWNLOAD\FP000100.TTF',
'C:\WINDOWS\FONTS\FP000100.TTF', hBool);
hReg := TRegistry.Create;
hReg.RootKey := HKEY_LOCAL_MACHINE;
hReg.LazyWrite := false;
hReg.OpenKey('Software\Microsoft\Windows\CurrentVersion\Fonts',
false);
hReg.WriteString('TESTMICR (TrueType)','FP000100.TTF');
hReg.CloseKey;
hReg.free;
//Add the font resource
AddFontResource('c:\windows\fonts\FP000100.TTF');
SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);
//Remove the resource lock
RemoveFontResource('c:\windows\fonts\FP000100.TTF');
SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);
end;