c# - Automating Key Presses with SendInput -

When I try to use the SendInput to send a single key press, and the combined Keypresses, I did not get my program to capture the keyboard button until I was ordered to be released. With the code below I want to send the character 'a' and 'A' by killing shift first. However, I can not keep it in the 'a' button.

  public static zero keydown () {switchwindow (process gate process_name ("notepad") .FirstOrDefault () MainWindowHandle). INPUT [] Input = new INPUT [1]; KEYBDINPUT KB = new KEYBDINPUT (); // Set Generic Keyboard Event Inputs [0] Type = INPUT_KEYBOARD; kb.wScan = 0; // hardware scan code for key kb.time = 0; Kb.dwExtraInfo = IntPtr.Zero; Kb.dwFlags = 0; Press key to press the key. Kb.wVk = (ushort) KeyCode.SHIFT; Input [0] .ki = kb; SendInput (1, Input, Marshall Size. (Input [0]); // press 'a' key kb.wVk = (ushort) 0x41; // virtual key code for "a" key inputs [0] .ki = kb; SendInput (1, Input, Marshall Size. (Input [0]); // Release 'A' key kb.dwFlags = KEYEVENTF_KEYUP; Kb.wVk = (ushort) 0x41; // "A" key input for the virtual key code [0] .ki = kb; SendInput (1, Input, Marshall Size. (Input [0]); // Release 'Shift' key kb.dwFlags = KEYEVENTF_KEYUP; Kb.wVk = (ushort) KeyCode.SHIFT; // "A" key input for the virtual key code [0] .ki = kb; SendInput (1, Input, Marshall Size. (Input [0]); }   
 Any ideas why, if I delete the last two  SendInput  s, this does not just catch the code   ?   
 
 
 For the benefit of others, who are searching to use SendInput () in C # , Please see the details below.  
 1) In two ways to send a key stroke with SendInput (), either using a Scancode or  
 2) If you intend to send keystrokes to a game Or any other application that takes input from Direct 3D (or other Direct Input Environment), you need to send key stroke as scanned, and for this you specify the WScan field, and leave wVk blank . See information here:  
 3) Before sending the keystroke, remember to switch the focus on the window to the application that you want to send the keystroke. Example:  
  MemoryHandler SweetWindows (ProcessGetProjectByName ("Notepad"). FirstOver Default (). MainWindowHandle);   
 4) Last code:    public static zero presses (four cr, beel press) {byte vk = memoryup. VKKKen (CA); Prescakes ((Memory API.ccode) VK, Press); } Public static Zero Press (Memory API.ccode vk, bool press) {User scan code = (USHort) MemoryApi.MapVirtualKey (ushort) vk, 0); //Console.WriteLine ("SendInput :: VK:" + + (ushort) vk + "(" + vk + ") & lt; - & gt; Scheduled Caste:" + (ushort) (scan code & amp; 0xff) ); If (press) keydown (scancod); And key (scan code); } Public static zero keydown (USHort scan code) {//Console.WriteLine ("Down Below" (SC): "+ (USHort) (Scan Code & amp; 0xff); MemoryApi.INPUT [] Input = New MemoryApi .INPUT [1]; Input [0]. Type = MemoryApi.INPUT_KEYBOARD; Input [0] .ki.wScan = (Uhort) (Scancode & amp; 0xff); Input [0] .ki.dwFlags = MemoryApi.KEYEVENTF_SCANCODE; Input [0] .ki.time = 0; Input [0] .ki.dwExtraInfo = IntPtr.Zero; UIT IntReturn = MemoryApi.SendInput (1, Input, Marshall Size. (Input [0]); If (Interetron! = 1) {new exception throw ("Could not send key:" + scan code);} Incomplete static zero keyboard (USHort scanned code) {//Console.WriteLine ("above (SC):" + scan code); MemoryApi.INPUT [] input = new MemoryApi.INPUT [1]; input [0]. Type = MemoryApi.INPUT_KEYBOARD; Input [0] .ki.wScan = (Uhort) (Scancode & amp; 0xff); Input [0] .ki.dwFlags = MemoryApi.KEYEVENTF_SCANCODE | MemoryApi.KEYEVENTF_KEYUP; Input [0] .ki.time = 0; Input [0] .ki.dwExtraInfo = IntPtr.Zero; UIT IntReturn = MemoryApi.SendInput (1, Input, Marshal. Size (input [0])); If (internator! = 1) {new exception throw ("could not send key:" + scan code); }}