c# - How to use EVENT_SYSTEM_MOVESIZESTART with WinEventProc as global window locationchange/resize event? -


i'm trying catch move , resize event globally. found way use event_system_movesizestart event via win32 api wineventproc (actually i'm using c# p/invoke). couldn't find detail information it. have questions:

  • q1. there way distinguish move or resize when raised event_system_movesizestart event, without polling window size/location.

    public static void __wineventdelegate(intptr hwineventhook, native.event eventtype, intptr hwnd, native.objid idobject, native.childid idchild, uint dweventthread, uint dwmseventtime) {     if (eventtype == native.event.system_movesizestart)     {         switch (__something__)         {             case __this_event_is_move:                 dosomethingwhenmovestarted();                 break;             case __this_event_is_resize:                 dosomethingwhenresizestarted();                 break;

    (imho, windows not distinguish them internally...?)

  • q2. there event or way event_system_movingresizing, raised continuously, mousemove event on javascript/dom?

if have way q1,q2, let me know please! thanks.

the event specified event_system_movesizestart sent system.

i doubt event recognized defwindowproc.

but during scenario, guess window receives wm_entersizemove.

then can handle in case statement of overridden window procedure function.

the wparam specifies sc_move or sc_size value, identify whether move or resize.

below pseudo code: 

lresult callback wndproc(hwnd hwnd, uint message, wparam wparam, lparam lparam) {     switch (message)    {    case wm_entersizemove:      if(wparam == sc_move)         {         //move         }         else         {         //resize         }          default:     //call default winproc    }  }

as saying c#, there events associated wm_entersizemove , wm_exitsizemove in system.windows.forms. resizebegin , resizeend. little unsure if these events can handle move.


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