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@mattleibow
Created September 6, 2022 23:48
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public MainPage()
{
InitializeComponent();
#if WINDOWS
// WindowLongFlags
const int GWL_STYLE = -16;
const int GWL_EXSTYLE = -20;
// WindowStyles
const int WS_CAPTION = 0xc00000;
const int WS_THICKFRAME = 0x00040000;
const int WS_MINIMIZE = 0x20000000;
const int WS_MAXIMIZE = 0x01000000;
const int WS_SYSMENU = 0x00080000;
const int WS_EX_DLGMODALFRAME = 0x00000001;
const int WS_EX_CLIENTEDGE = 0x00000200;
const int WS_EX_STATICEDGE = 0x00020000;
// SetWindowPosFlags
const uint SWP_FRAMECHANGED = 0x0020;
const uint SWP_NOMOVE = 0x0002;
const uint SWP_NOSIZE = 0x0001;
const uint SWP_NOZORDER = 0x0004;
const uint SWP_NOOWNERZORDER = 0x0200;
Loaded += MainPage_Loaded;
void MainPage_Loaded(object sender, EventArgs e)
{
var wnd = Window.Handler.PlatformView as Microsoft.UI.Xaml.Window;
var hwnd = WinRT.Interop.WindowNative.GetWindowHandle(wnd);
var lStyle = GetWindowLongPtr(hwnd, GWL_STYLE);
lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZE | WS_MAXIMIZE | WS_SYSMENU);
SetWindowLongPtr(hwnd, GWL_STYLE, lStyle);
var lExStyle = GetWindowLongPtr(hwnd, GWL_EXSTYLE);
lExStyle &= ~(WS_EX_DLGMODALFRAME | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE);
SetWindowLongPtr(hwnd, GWL_EXSTYLE, lExStyle);
SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOOWNERZORDER);
}
static IntPtr GetWindowLongPtr(IntPtr hWnd, int nIndex) =>
IntPtr.Size == 8
? GetWindowLongPtr64(hWnd, nIndex)
: GetWindowLongPtr32(hWnd, nIndex);
static IntPtr SetWindowLongPtr(IntPtr hWnd, int nIndex, IntPtr dwNewLong) =>
IntPtr.Size == 8
? SetWindowLongPtr64(hWnd, nIndex, dwNewLong)
: new IntPtr(SetWindowLong32(hWnd, nIndex, dwNewLong.ToInt32()));
[DllImport("user32.dll", SetLastError = true)]
static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
[DllImport("user32.dll", EntryPoint = "GetWindowLong")]
static extern IntPtr GetWindowLongPtr32(IntPtr hWnd, int nIndex);
[DllImport("user32.dll", EntryPoint = "GetWindowLongPtr")]
static extern IntPtr GetWindowLongPtr64(IntPtr hWnd, int nIndex);
[DllImport("user32.dll", EntryPoint = "SetWindowLong")]
static extern int SetWindowLong32(IntPtr hWnd, int nIndex, int dwNewLong);
[DllImport("user32.dll", EntryPoint = "SetWindowLongPtr")]
static extern IntPtr SetWindowLongPtr64(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
#endif
}
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