How to implement a userdefined cursor in C#? -

i want define own cursor current cursor in wpf application, wenn try create new cursor object .cur file, error.

my code is

     private void newfile()     {  ...        ievent_dragdrop = (htmldocumentevents2_event)doc;       ievent_dragdrop.ondragstart += new htmldocumentevents2_ondragstarteventhandler(ievent_ondragstart);              }       private bool ievent_ondragstart(ihtmleventobj pevtobj)     {         x_start = pevtobj.x;           // read position of mouse         y_start = pevtobj.y;          ....          if (file.exists("mycursor.cur"))         {             system.windows.forms.cursor mycursor = new system.windows.forms.cursor(gettype(), "mycursor.cur");             system.windows.forms.cursor.current = mycursor;             //system.windows.forms.messagebox.show("file exist");         }         else system.windows.forms.messagebox.show("file not exist");          return false;     } 

when try drag html object, error system.nullreferenceexception wasn´t handled in source-code. tested if file exists .... can tell me, what´s mistake?

thanks!

i recommend searching web before asking. first search result title explains should need know.

try out:

class program {     [system.stathread]     static void main(string[] args) {         byte[] cursorbytes = new system.net.webclient().downloaddata(@"https://github.com/tlorach/nvgraphy/raw/master/cursor1.cur");         system.io.stream cursorstream = new system.io.memorystream(cursorbytes, false);         system.windows.forms.cursor cursor = new system.windows.forms.cursor(cursorstream);         system.windows.forms.form mainform = new system.windows.forms.form();         mainform.cursor = cursor;         system.windows.forms.application.run(mainform);     } } 

or this:

class program {     [system.stathread]     static void main(string[] args) {         system.windows.forms.openfiledialog opendialog = new system.windows.forms.openfiledialog();         opendialog.filter = "cursor (*.cur)|*.cur";         switch(opendialog.showdialog()) {             case system.windows.forms.dialogresult.ok:                 system.windows.forms.cursor cursor = new system.windows.forms.cursor(opendialog.filename);                 system.windows.forms.form mainform = new system.windows.forms.form();                 mainform.cursor = cursor;                 system.windows.forms.application.run(mainform);                 break;         }     } }