比如要在窗体上画圆,Text1供输入角度(不得超过360,否则出错),Command1画图: 
Private Sub Command1_Click() 
Const rPI As Single = 3.14159265358979 '圆周率 
Me.Cls '清屏 
Me.Circle (1400, 1400), 1000, , 0, Val(Text1.Text) / 180 * rPI 
End Sub 
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汗~我对一无所知…… 
我写的明显是VB6的程序…… 
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Circle (x, y), radius, [color], [start], [end] [, aspect] 
(x,y) 代表圆心 
radius 代表半径 
color 代表颜色 
start 代表起始弧度 
end 代表结束弧度 *start与end差距不能大于360 
比如在窗体上画圆,Text1输角度,Command1画图: 
Private Sub Command1_Click() 
Const rPI As Single = 3.14159265358979 '圆周率 
Me.Cls '清屏 
Me.Circle (1400, 1400), 1000, , 0, Val(Text1.Text) / 180 * rPI 
End Sub