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I am trying to use SendInput() to send a sentence to another application (Notepad) and then send it hitting the Enter Key.

Any code snippets? Or help

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4 Answers 4

Reset to default
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INPUT input; WORD vkey = VK_F12; // see link below input.type = INPUT_KEYBOARD; input.ki.wScan = MapVirtualKey(vkey, MAPVK_VK_TO_VSC); input.ki.time = 0; input.ki.dwExtraInfo = 0; input.ki.wVk = vkey; input.ki.dwFlags = 0; // there is no KEYEVENTF_KEYDOWN SendInput(1, &input, sizeof(INPUT)); input.ki.dwFlags = KEYEVENTF_KEYUP; SendInput(1, &input, sizeof(INPUT));

List of virtual key codes .....

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Use VkKeyScanEx( char, KeyboardLayout ) to put your "common" chars into this example :) ... input.ki.wVk = VkKeyScanEx('a',kbl); as for the KeyboardLayout the simpliest way is to load current window's keyboardLayout: HKL kbl = GetKeyboardLayout(0);
Thank you and @jave.web for the answer. I made up my code for inputting character in the answer below (sorry I can't find how to insert code into comment section).
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I made a modification after reading @Nathan's code, this reference and combined with @jave.web's suggestion. This code can be used to input characters (both upper-case and lower-case). 

#define WINVER 0x0500 #include<windows.h> void pressKeyB(char mK) { HKL kbl = GetKeyboardLayout(0); INPUT ip; ip.type = INPUT_KEYBOARD; ip.ki.time = 0; ip.ki.dwFlags = KEYEVENTF_UNICODE; if ((int)mK<65 || (int)mK>90) //for lowercase { ip.ki.wScan = 0; ip.ki.wVk = VkKeyScanEx( mK, kbl ); } else //for uppercase { ip.ki.wScan = mK; ip.ki.wVk = 0; } ip.ki.dwExtraInfo = 0; SendInput(1, &ip, sizeof(INPUT)); }

Below is the function for pressing Return key:

 void pressEnter() { INPUT ip; ip.type = INPUT_KEYBOARD; ip.ki.time = 0; ip.ki.dwFlags = KEYEVENTF_UNICODE; ip.ki.wScan = VK_RETURN; //VK_RETURN is the code of Return key ip.ki.wVk = 0; ip.ki.dwExtraInfo = 0; SendInput(1, &ip, sizeof(INPUT)); }
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Just a note, in case others are confused: The pressEnter() function works for text fields/editors, but doesn't trigger a response in some form controls. The following post works correctly in both cases with VK_RETURN: stackoverflow.com/a/20857633/8690169
Line 9 reads if ((int)mK<65 && (int)mK>90), i.e. the char code, cast to an int, must be smaller than 65 and larger than 90 at the same time. I assume this must be an or, i.e. if ((int)mK<65 || (int)mK>90), to match special and small chars in the ASCII table, otherwise the condition is mutually exclusive and can never be met
Thank you @BobbieE.Ray for pointing this out. I edited the post following your suggestion.
Thanks for updating the code. If you could give my remark some kudos I'd appreciate it. I'm working my way so up that some day I can edit answers directly :) Thank you
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The SendInput function accepts an array of INPUT structures. The INPUT structures can either be a mouse or keyboard event. The keyboard event structure has a member called wVk which can be any key on the keyboard. The Winuser.h header file provides macro definitions (VK_*) for each key.

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Theres a simple C++ sample here http://nibuthomas.wordpress.com/2009/08/04/how-to-use-sendinput/

And a more complete VB sample here http://vb.mvps.org/samples/SendInput/

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