c# - How to hide desktop icons programatically? -

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how can show/hide desktop icons programatically, using c#?

i'm trying create alternative desktop, uses widgets, , need hide old icons.

you can using windows api. here sample code in c# toggle desktop icons.

    [dllimport("user32.dll", setlasterror = true)] static extern intptr findwindow(string lpclassname, string lpwindowname);     [dllimport("user32.dll", setlasterror = true)] static extern intptr getwindow(intptr hwnd, getwindow_cmd ucmd);     enum getwindow_cmd : uint     {         gw_hwndfirst = 0,         gw_hwndlast = 1,         gw_hwndnext = 2,         gw_hwndprev = 3,         gw_owner = 4,         gw_child = 5,         gw_enabledpopup = 6     }     [dllimport("user32.dll", charset = charset.auto)] static extern intptr sendmessage(intptr hwnd, uint32 msg, intptr wparam, intptr lparam);      private const int wm_command = 0x111;      static void toggledesktopicons()     {         var toggledesktopcommand = new intptr(0x7402);         intptr hwnd = getwindow(findwindow("progman", "program manager"), getwindow_cmd.gw_child);         sendmessage(hwnd, wm_command, toggledesktopcommand, intptr.zero);     }

this sends message shelldll_defview child window of progman, tells toggle visibility (by adding or removing ws_visible style) of it's child, "folderview". "folderview" actual window contains icons.

to test see if icons visible or not, can query ws_visible style using getwindowinfo function, shown below:

    [return: marshalas(unmanagedtype.bool)]     [dllimport("user32.dll", setlasterror = true)]     private static extern bool getwindowinfo(intptr hwnd, ref windowinfo pwi);      [structlayout(layoutkind.sequential)]     public struct rect     {         private int _left;         private int _top;         private int _right;         private int _bottom;     }      [structlayout(layoutkind.sequential)]     struct windowinfo     {         public uint cbsize;         public rect rcwindow;         public rect rcclient;         public uint dwstyle;         public uint dwexstyle;         public uint dwwindowstatus;         public uint cxwindowborders;         public uint cywindowborders;         public ushort atomwindowtype;         public ushort wcreatorversion;          public windowinfo(boolean? filler)             : this()   // allows automatic initialization of "cbsize" "new windowinfo(null/true/false)".         {             cbsize = (uint32)(marshal.sizeof(typeof(windowinfo)));         }      }

here function calls above code , returns true if window visible, false if not.

    static bool isvisible()     {         intptr hwnd = getwindow(getwindow(findwindow("progman", "program manager"), getwindow_cmd.gw_child), getwindow_cmd.gw_child);         windowinfo info = new windowinfo();         info.cbsize = (uint)marshal.sizeof(info);         getwindowinfo(hwnd, ref info);         return (info.dwstyle & 0x10000000) == 0x10000000;     }

the windows api code along more information window styles can found here: http://www.pinvoke.net/default.aspx/user32/getwindowinfo.html





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