Delphi buttons show white border on Aero glass

Question

I have been trying to find a good-looking design using Aero in Delphi 2010. One of the obvious uses one sees, is where the glass frame is extended to include the OK/Cancel butto

Answer 1

if you are able to use win32 api, try exploiting NM_CUSTOMDRAW notification (not ownerdraw), as i do (yes, buttons DO send it, including radio and checkboxes. For these it is best to use WM_CTLCOLORSTATIC though.). This is how it is done in C++, but the idea is the same. While my idea is good, it so happens that my buttons do DISAPPEAR once per program execution from the window, when they are customdrawn and i need to hover mouse over them so they are visible again. That's why i'm still looking for comments for this. Note that it is really difficult to reproduce disappearing buttons in one-form applications. I hovewer am experiencing this behaviour in every project.

case WM_NOTIFY:
  switch(((LPNMHDR)lParam)->code){
  case NM_CUSTOMDRAW:
    {
       NMHDR *nmh=(NMHDR*)lParam;
       //these 6000 through 6004 are button identifiers assigned by me
       if(nmh->idFrom >= 6000 && nmh->idFrom <= 6004){
         switch(((LPNMCUSTOMDRAW)nmh)->dwDrawStage){
           case CDDS_PREERASE:
             //BackgroundBrush is a HBRUSH used also as window background
             FillRect(((LPNMCUSTOMDRAW)nmh)->hdc, &((LPNMCUSTOMDRAW)nmh)->rc, BackgroundBrush);
             break;
         }
    }
    break;
}
break;