winform设置边框颜色不像webform那么简单，可以通过设置FlatAppearance，也可以通过重绘实现。
一、设置按钮本身属性
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buttonBubufx.FlatStyle = FlatStyle.Flat;buttonBubufx.BackColor = Color.SkyBlue;buttonBubufx.FlatAppearance.BorderColor = buttonBubufx.BackColor; |
二、重绘，设置按钮的Region
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private
static int
WM_NCPAINT = 0x0085;
private
static int
WM_ERASEBKGND = 0x0014;
private
static int
WM_PAINT = 0x000F;
[DllImport("user32.dll")]
static
extern IntPtr GetDCEx(IntPtr hwnd, IntPtr hrgnclip, uint
fdwOptions);
[DllImport("user32.dll")]
static
extern int
ReleaseDC(IntPtr hwnd, IntPtr hDC);
protected
override void
WndProc(ref
Message m)
{
base.WndProc(ref
m);
if
(m.Msg == WM_NCPAINT || m.Msg == WM_ERASEBKGND || m.Msg == WM_PAINT)
{
IntPtr hdc = GetDCEx(m.HWnd, (IntPtr)1, 1 | 0x0020);
if
(hdc != IntPtr.Zero)
{
Graphics graphics = Graphics.FromHdc(hdc);
Color borderColor = Color.HotPink;
Rectangle rectangle = new
Rectangle(textBox1.Location.X, textBox1.Location.Y + (25), textBox1.Width, textBox1.Height);
ControlPaint.DrawBorder(graphics, rectangle, borderColor, ButtonBorderStyle.Solid);
m.Result = (IntPtr)1;
ReleaseDC(m.HWnd, hdc);
}
}
}
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原帖地址：winform设置button的边框颜色，或取消边框颜色，不显示边框。
bubufx提供，禁止转载。