I was wondering how can I simulate a key depression in C++. Such as having code that when I run the program it presses the letter "W" key. I don't want to be displaying it in a console window I just want it to display the "W" key every time I click on a text field. Thanks!
Note: I am not trying to make a spammer.
To simulate native-language keystrokes, you can also use the [Xnn] or [Dnn] constants in the string passed to the Keys method. nn specifies the virtual-key code of the key to be “pressed”. For instance, [X221]u[X221]e will “type” the u and e characters with the circumflex accent.
kbhit() is present in conio. h and used to determine if a key has been pressed or not. To use kbhit function in your program you should include the header file “conio.
ki. wVk = 0x41; // virtual-key code for the "a" key ip. ki. dwFlags = 0; // 0 for key press SendInput(1, &ip, sizeof(INPUT)); // ...
It looks like you want to use either SendInput()
or keybd_event()
(which is an older way of doing the same thing).
First - find this answer on how to use sendinput function in C++.
Look at the code section:
// ... INPUT ip; // ... // Set up a generic keyboard event. ip.type = INPUT_KEYBOARD; ip.ki.wScan = 0; // hardware scan code for key ip.ki.time = 0; ip.ki.dwExtraInfo = 0; // Press the "A" key ip.ki.wVk = 0x41; // virtual-key code for the "a" key ip.ki.dwFlags = 0; // 0 for key press SendInput(1, &ip, sizeof(INPUT)); // ...
I didn't understand where the magic number 0x41
came from.
Go to SendInput documentation page. Still don't understand where's the 0x41
.
Go to INPUT documentation and from there to KEYBDINPUT documentation. Still no magic 0x41
.
Finally go to Virtual-Key Codes page and understand that Microsoft has given the names for Ctrl (VK_CONTROL), Alt (VK_MENU), F1-F24 (VK_F1 - VK_F24, where are 13-24 is a mystery), but forgot to name characters. Actual characters have codes (0x41-0x5A
), but don't have names like VK_A - VK_Z
I was looking for in winuser.h
header.
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