Set min size of windows with Windows App SDK

Question

Are there any method to set min size of windows with windows app sdk like we could do before, with ApplicationView.SetPreferredMinSize(Size) (uwp)

Answer 1

With WM_GETMINMAXINFO

For example :

//  
IntPtr hWnd = IntPtr.Zero;    
private SUBCLASSPROC SubClassDelegate;    
			  
// after this.InitializeComponent();  
hWnd = WinRT.Interop.WindowNative.GetWindowHandle(this);    
    SubClassDelegate = new SUBCLASSPROC(WindowSubClass);  
    bool bReturn = SetWindowSubclass(hWnd, SubClassDelegate, 0, 0);  

//  
    private int WindowSubClass(IntPtr hWnd, uint uMsg, IntPtr wParam, IntPtr lParam, IntPtr uIdSubclass, uint dwRefData)  
    {  
        switch (uMsg)  
        {  
            case WM_GETMINMAXINFO:  
                {  
                    MINMAXINFO mmi = (MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(MINMAXINFO));  
                    mmi.ptMinTrackSize.X = 300;  
                    mmi.ptMinTrackSize.Y = 300;  
                    Marshal.StructureToPtr(mmi, lParam, false);  
                    return 0;  
                }  
                break;  
        }  
        return DefSubclassProc(hWnd, uMsg, wParam, lParam);  
    }  
      
      
    public delegate int SUBCLASSPROC(IntPtr hWnd, uint uMsg, IntPtr wParam, IntPtr lParam, IntPtr uIdSubclass, uint dwRefData);  

    [DllImport("Comctl32.dll", SetLastError = true)]  
    public static extern bool SetWindowSubclass(IntPtr hWnd, SUBCLASSPROC pfnSubclass, uint uIdSubclass, uint dwRefData);  

    [DllImport("Comctl32.dll", SetLastError = true)]  
    public static extern int DefSubclassProc(IntPtr hWnd, uint uMsg, IntPtr wParam, IntPtr lParam);  

    public const int WM_GETMINMAXINFO = 0x0024;  

    public struct MINMAXINFO  
    {  
        public System.Drawing.Point ptReserved;  
        public System.Drawing.Point ptMaxSize;  
        public System.Drawing.Point ptMaxPosition;  
        public System.Drawing.Point ptMinTrackSize;  
        public System.Drawing.Point ptMaxTrackSize;  
    }