How to emulate all applications for keyboard input

Computer screen keyboard tutorial, OSK program system simulates keyboard and mouse instead of keyboard input characters.

1.In Microsoft Windows, the keyboard and mouse are two standard sources of user input that often complement each other in some overlapping operations. Of course, mice are more widely used in applications today than they were 10 years ago.

Even in some applications, we are more accustomed to using a mouse, such as in games, paint programs, programs, and programs such as the web creator. However, we can do without a mouse, but we must not remove the keyboard from a PC in general.

The way a Windows program obtains keyboard input: The window process by which keyboard input is delivered to the program in the form of a message. In fact, the keyboard is a clear example of this when learning messages for the first time: the type of information that a message should deliver to an application.

Windows uses 8 different messages to deliver different keyboard events. This may seem like too much, but (as we can see) the program can ignore at least half of these messages without any problems. And, in most cases, these messages will contain more keyboard information than the program needs.

Part of the keyboard's job is identifying which messages are important and which aren't.

C language analog keyboard** is as follows:

int winapi winmain(hinstance hinstance,hinstance hprevinstance,lpstr szcmdline,int icmdshow)

if(!initinstance(hinstance,icmdshow))

return ;

Function: showkey

Purpose: Realize the display of key information in the window.

void showkey (hwnd hwnd, int itype,char *szmessage,wparam wparam,lparam lparam)

char szbuffer[80];

hdc hdc;

hdc = getdc (hwnd);

selectobject (hdc, getstockobject (system_fixed_font));

textout (hdc,xchar, ychar,szbuffer,wsprintf szbuffer,szformat[itype]。

C is a general-purpose computer programming language with a wide range of applications. C is designed to provide a programming language that can compile in a simple way, handle low-level memory, generate a small amount of machine code, and run without any runtime support.

Although C provides many low-level processing functions, it still maintains a good cross-platform characteristic, and C programs written in a standard specification can be compiled on many computer platforms, including some embedded processors (microcontrollers or MCUs) and supercomputers.