截取屏幕宽高

//截取屏幕宽高
GetSystemMetrics(SM_CXSCREEN)
GetSystemMetrics(SM_CYSCREEN)


方法一(通过 Width、ClientWidth 推算):
var
  frame,caption: Integer;
begin
  frame := (Width - ClientWidth) div 2;
  caption := Height - ClientHeight - frame * 2;
  ShowMessageFmt('边框宽: %d; 标题高: %d', [frame,caption]); {边框宽: 4; 标题高: 26}
end;


方法二(用 GetSystemMetrics 函数获取):
var
  frame,caption: Integer;
begin
  frame := GetSystemMetrics(SM_CXFRAME);
  caption := GetSystemMetrics(SM_CYCAPTION);
  ShowMessageFmt('边框宽: %d; 标题高: %d', [frame,caption]); {边框宽: 4; 标题高: 26}
end;