Get all installed components?

Problem/Question/Abstract:

How to get all installed components?

Answer:

uses ToolsApi;

{....}

var
a, i: Integer;
begin
with (BorlandIDEServices as IOTAPackageServices) do
begin
for a := 0 to GetPackageCount - 1 do
begin
for i := 0 to GetComponentCount(a) - 1 do
begin
{get each component name with GetComponentName(a, i);}
end;
end;
end;
end;