Ah, that was it maybe, I remember the post, knew I remembered something about it, anyhow, I fixed it and pushed it to my repo
this is what I was after, nice procedural round buttons
UINT iColor = agk::MakeColor(97, 97, 97, 100);
UINT iColor2 = agk::MakeColor(97, 97, 97, 255);
UINT iColor3 = agk::MakeColor(197, 197, 197, 200);
UINT iColor4 = agk::MakeColor(197, 197, 197, 150);
UINT iColor5 = agk::MakeColor(197, 197, 197, 100);
agk::DrawEllipse(300, 300, 100, 100, iColor, iColor2, 1);
agk::DrawEllipse(300, 300, 100, 100, iColor2, iColor2, 0);
agk::DrawEllipse(300, 300, 101, 101, iColor3, iColor3, 0);
agk::DrawEllipse(300, 300, 102, 102, iColor3, iColor4, 0);
agk::DrawEllipse(300, 300, 103, 103, iColor3, iColor5, 0);
agk::DrawEllipse(300, 300, 104, 104, iColor, iColor, 0);