C＃窗体中的控制框（最大化，最小化和关闭按钮）问题 [英] Controlbox(maximise, minimise and close button) issue in C# windows form
问题描述
Hello All，
我正在使用以下代码更改标题栏的颜色，但是当我最大化我的或调整表单大小时，控制框不会出现。当我鼠标悬停然后再次出现控制框时，任何人都知道下面的代码有什么问题？
[DllImport（user32.dll）]
static extern int ReleaseDC（IntPtr hWnd，IntPtr hDc）;
[DllImport（User32.dll）]
private static extern IntPtr GetWindowDC（IntPtr hWnd）;
public Form1（）
{
InitializeComponent（）;
}
protected override void WndProc（ref message m）
{
base.WndProc（ref m）;
const int WM_NCPAINT = 0x85;
if（m.Msg == WM_NCPAINT）
{
IntPtr hdc = GetWindowDC（m .HWnd）;
if（（int）hdc！= 0）
{
Graphics g = Graphics.FromHdc（hdc）;
SolidBrush b =新的SolidBrush（Color.FromArgb（ 0,116,212））;
g.FillRectangle（b，new Rectangle（0,0,4800,30））;
g.Flush（）;
ReleaseDC（m.HWnd，hdc）;
}
}
}
private void Form1_Load（object sender，EventArgs e）
{
this.BackColor = Color.FromArgb（214,236,246）;
this.StartPosition = FormStartPosition.CenterScreen;
}
我尝试了什么：
我试过上面的代码。还有很多其他的代码，但是我遇到了与控制盒相同的问题。
Hello All,
I am changing color of title bar using following code but when I maximise my or resize form then control box not appear. when I mouse over then again control box will appear so any one know what is the issue in following code?
[DllImport("user32.dll")]
static extern int ReleaseDC(IntPtr hWnd, IntPtr hDc);
[DllImport("User32.dll")]
private static extern IntPtr GetWindowDC(IntPtr hWnd);
public Form1()
{
InitializeComponent();
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
const int WM_NCPAINT = 0x85;
if (m.Msg == WM_NCPAINT)
{
IntPtr hdc = GetWindowDC(m.HWnd);
if ((int)hdc != 0)
{
Graphics g = Graphics.FromHdc(hdc);
SolidBrush b = new SolidBrush(Color.FromArgb(0, 116, 212));
g.FillRectangle(b, new Rectangle(0, 0, 4800, 30));
g.Flush();
ReleaseDC(m.HWnd, hdc);
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
this.BackColor = Color.FromArgb(214, 236, 246);
this.StartPosition = FormStartPosition.CenterScreen;
}
What I have tried:
I tried above code. and many other code but I face same issue with control box.
推荐答案
简单：你做的基本NCPaint，我怀疑它处理控制盒的子控件和相关的控制，然后用你的新颜色涂上它们。
我建议你不要试图只绘画它，而是要看一下整个表格应用皮肤。有几种方法可以做到这一点，但大多数都需要花钱：
皮肤引擎。 C ++，C＃，Visual Basic皮肤 [ ^ ]
Windows Forms .NET扩展的VisualStyler [ ^ ]
Google会为您找到更多信息：剥皮c＃ - Google搜索 [ ^ ]
Simple: you do the base NCPaint which I suspect handles it's sub controls for the Control Box and related controls and then paint over them with your new colour.
I would suggest that instead of trying to just paint it you have a look at applying a Skin to the whole form. There are several ways to do that, but most do cost money:
Skin engine. C++, C#, Visual Basic skinning[^]
VisualStyler for Windows Forms .NET extension[^]
Google will find you more: skinning c# - Google Search[^]
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