C # register Ctrl + space as the hotkey, and send Ctrl + shift after capturing

1   Public   Partial   Class  Form2: Form  2   {  3 [Dllimport ( "  USER32  "  )]  4           Public   Static   Extern   Bool Registerhotkey (intptr hwnd, Int ID, Uint  Control, keys VK );  5           //  API for removing registration hotkeys  6 [Dllimport ( "  USER32  "  )]  7           Public   Static   Extern   Bool Unregisterhotkey (intptr hwnd, Int  ID );  8           Const   Int Wm_hotkey = Zero X 0312  ;  9           Public  Form2 ()  10   {  11   Initializecomponent ();  12   } 13   14           Private   Void Form2_load ( Object  Sender, eventargs E)  15   {  16               //  Code 100  17 Hotkey. registerhotkey (handle, 100  , Hotkey. keymodifiers. Ctrl, keys. space );  18  }  19   20           Private   Void Form1_formclosed ( Object  Sender, formclosedeventargs E)  21   {  22               //  Code 100  23 Hotkey. unregisterhotkey ( This . Handle, 100 );  24   }  25   26           Protected   Override   Void Wndproc ( Ref  Message m)  27   {  28               Switch  (M. msg)  29   { 30                   Case  Wm_hotkey:  31   {  32                       Switch  (M. wparam. toint32 ())  33   {  34                           Case   100  :  35   {  36 Sendkeys. Send ( "  ^ +  " ); //  Shift: + ctrl: ^  37                               Break  ;  38   }  39   }  40                       Break  ;  41  }  42   }  43               Base . Wndproc ( Ref  M );  44   }  45   }  46   47       Public   Class  Hotkey  48  {  49           //  If the function is successfully executed, the return value is not 0.  50           //  If the function fails to be executed, the return value is 0. To get the extended error message, call getlasterror.  51 [Dllimport ( "  User32.dll  " , Setlasterror = True  )]  52           Public   Static  Extern   Bool  Registerhotkey (  53 Intptr hwnd, //  Handle of the window to define the Hot Key  54               Int ID, //  Define the hotkey ID (cannot be the same as other IDS)  55 Keymodifiers fsmodifiers, //  Indicates whether the hotkey takes effect only when you press ALT, Ctrl, shift, or windows.  56 Keys VK //  Define the content of the hotkey  57   );  58   59 [Dllimport ( "  User32.dll  " , Setlasterror = True  )]  60           Public   Static   Extern  Bool  Unregisterhotkey (  61 Intptr hwnd, //  Handle of the window to which the hotkey is to be canceled  62               Int ID //  ID of the hotkey to be canceled  63   );  64   65           //  Defines the name of the secondary key (convert a number into a character for memory, or use a value directly for this enumeration) 66   [Flags ()]  67           Public   Enum  Keymodifiers  68   {  69 None = 0  ,  70 Alt = 1  ,  71 CTRL = 2 ,  72 Shift = 4  ,  73 Windowskey = 8  74   }  75 }