"C #" "SHARE" the Registering of global hotkeys

I remember if I was still using VB6 sereval years ago, if global hotkeys is required, a massive system-hooking pro Gram would be used.

That ' s terrible,wasn ' t it? :)

But in C #, this can be much easier. We can use System APIs: RegisterHotKey and Unregisterhotkey(this links to the official document of Micro Soft

What does next? Certianly is-to-encapsulate those function into a class-in order-to-use it rapidly. (Thanks for Sir.) Bomo for his template, which is the hispage)

The following class, the function Processkey is of great importance.

In the main form-class, a \ (void WndProc (reg Message m) \) are required,which used to processing the hotkey sends in.

Code: (After your register the hotkey,press ctrl+alt+s to hide/show you window.)

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.ComponentModel;4 usingSystem.Data;5 usingSystem.Drawing;6 usingSystem.Linq;7 usingSystem.Text;8 usingSystem.Threading.Tasks;9 usingSystem.Windows.Forms;Ten usingSystem.Runtime; One usingSystem.Runtime.InteropServices; A usingSystem.Diagnostics; -  - namespaceWindowsFormsApplication1 the { -      Public Partial classForm1:form -     { -Hotkeys h =Newhotkeys (); +  -          PublicForm1 () +         { A InitializeComponent (); at         } -  -         Private voidBtnregist_click (Objectsender, EventArgs e) -         { -             if(H.regist ( This. Handle, (int) HotKeys.HotkeyModifiers.Shift + (int) HotKeys.HotkeyModifiers.Control, KEYS.S, CallBack)) -MessageBox.Show ("Success"); in             ElseMessageBox.Show ("Failed"); -         } to         Private voidBtnunregist_click (Objectsender, EventArgs e) +         { -             if(H.unregist ( This. Handle, CallBack)) theMessageBox.Show ("Success"); *             ElseMessageBox.Show ("Failed"); $         }Panax Notoginseng  -         protected Override voidWndProc (refMessage m) the         { +H.processhotkey (m);//processing A             Base. WndProc (refm); the         } +  -          Public voidCallBack () $         { $              This. Visible =! This. Visible; -         } -  the         Private voidForm1_Load (Objectsender, EventArgs e) -         {Wuyi  the         } -  Wu  -          About     } $  -  -      Public classhotkeys -     { A  +[DllImport ("user32.dll")] the         Static extern BOOLRegisterHotKey (IntPtr hWnd,intIdintmodifiers, Keys VK); -[DllImport ("user32.dll")] $         Static extern BOOLUnregisterhotkey (IntPtr hWnd,intID); the          the  the  the         Private intkeyID =Ten;  -         Privatedictionary<int, hotkeycallbackhanlder> keymap =Newdictionary<int, hotkeycallbackhanlder>();  in          Public Delegate voidHotkeycallbackhanlder (); the         Private Const intWm_hotkey =0x312; the  About          Public enumhotkeymodifiers the         { theAlt =1, theControl =2, +Shift =4, -Win =8 the         }Bayi  the          Public BOOLRegist (IntPtr hWnd,intmodifiers, Keys VK, Hotkeycallbackhanlder callBack)//regist Hotkey the         { -             Try -             { the                 intid = keyid++; the                 if(! RegisterHotKey (hWnd, id, modifiers, VK))return false; theKeymap[id] =CallBack; the             } -             Catch{return false; }//Make the class stronger the             return true; the         } the 94          Public BOOLUnregist (IntPtr hWnd, Hotkeycallbackhanlder callBack)//UnRegister Hotkey the         { the             BOOLBX =false; the             foreach(keyvaluepair<int, hotkeycallbackhanlder>var inchkeymap)98             { About                 if(var. Value = =callBack) -                 {101                     Try102                     {103Unregisterhotkey (HWnd,var. Key);104Keymap. Remove (var. Key);//I think this Important,which the original author not add. the                     }106                     Catch { }107BX =true;108                 }109             } the             returnBX;111              the         }113  the          Public voidProcesshotkey (Message m)//Processing and React the         { the             if(m.msg = = Wm_hotkey)//The original author puts 0x312 here. Wm_hotkey can be clearer.117             {118                 intID =M.wparam.toint32 ();119 Hotkeycallbackhanlder callback; -                 if(Keymap. TryGetValue (ID, outcallback))121 callback ();122             }123         }124     } the}

"C #" "SHARE" the Registering of global hotkeys