问题
I like to have my form borderless in C#. So I used this code:
FormBorderStyle = FormBorderStyle.None;
But it removes the aero effect of windows 8. The form opens suddenly like a blink.
How can i bring the aero effect back?
回答1:
I am answering my own question using the C++ reference I wrote a class inherited from Form Class. Each form in application should be inherited from this class instead of Form Class.
public class AeroForm : Form
{
int _w = 100, _h = 100;
bool aero = false;
[StructLayout(LayoutKind.Sequential)]
struct MARGINS { public int Left, Right, Top, Bottom; }
[DllImport("dwmapi.dll", PreserveSig = false)]
static extern void DwmExtendFrameIntoClientArea
(IntPtr hwnd, ref MARGINS margins);
[DllImport("dwmapi.dll", PreserveSig = false)]
static extern bool DwmIsCompositionEnabled();
public AeroForm()
{
aero = IsCompositionEnabled();
}
public AeroForm(int width, int height)
: this()
{
_w = width;
_h = height;
Size = new Size(width, height);
}
protected override void WndProc(ref Message m)
{
const int WM_NCCALCSIZE = 0x0083;
switch (m.Msg)
{
case WM_NCCALCSIZE:
if (aero)
return;
break;
}
base.WndProc(ref m);
}
//this is for checking the OS's functionality.
//Windows XP does not have dwmapi.dll
//also, This corrupts the designer...
//so i used the Release/Debug configuration
bool IsCompositionEnabled()
{
#if !DEBUG
return File.Exists(Environment.SystemDirectory + "\\dwmapi.dll")
&& DwmIsCompositionEnabled();
#else
return false;
#endif
}
//this one is used for a shadow when aero is not available
protected override CreateParams CreateParams
{
get
{
const int CS_DROPSHADOW = 0x00020000;
const int WS_MINIMIZEBOX = 0x20000;
const int CS_DBLCLKS = 0x8;
CreateParams cp = base.CreateParams;
if (!aero)
cp.ClassStyle |= CS_DROPSHADOW;
cp.Style |= WS_MINIMIZEBOX;
cp.ClassStyle |= CS_DBLCLKS;
return cp;
}
}
//this is for aero shadow and border configurations
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
if (aero)
{
FormBorderStyle = FormBorderStyle.FixedSingle;
ControlBox = false;
MinimizeBox = false;
MaximizeBox = false;
Size = new Size(_w, _h);
MARGINS _glassMargins = new MARGINS()
{
Top = 5,
Left = 5,
Bottom = 5,
Right = 5
};
DwmExtendFrameIntoClientArea(this.Handle, ref _glassMargins);
}
else
FormBorderStyle = FormBorderStyle.None;
}
//When you minimize and restore, the size will change.
//this override is for preventing this unwanted resize.
protected override void OnPaint(PaintEventArgs e)
{
if (aero)
Size = new Size(_w, _h);
base.OnPaint(e);
}
}
with Show() and Application.Run() it works great! but it has some regressions when the form opens with ShowDialog(). Closing the form, you will see a border that closes after your client content hides.
来源:https://stackoverflow.com/questions/24641829/formborderstyle-none-removes-the-native-open-effect-of-windows-8