How to use a calculator coded in C to achieve keypad input?

1. Set the startselection property of textbox1 (I forgot whether it was this or selectionstart, which is used to set the selection position of the return text attribute), set to.

It's the default to the last character.,If it doesn't work, then +1.

2. Isn'?..t it all keyboard input?

You mean the keyboard doesn't allow you to type anything other than a few symbols?

Then add :: to the keypress(e) event function of the corresponding control

Here's an example:

Write ** in the keypress(e) event of the textbox.

Only underscores ( ) can be entered

intkey

int);ifkey

false;

true;Replace 95 with +-* = ascii with a few characters, and then you can look up the attributes.

Isn't it just a dozen buttons? Just pull them one by one.

If you feel that it is difficult to control, it will be dynamically generated in the background.

The keypad is not so simple yet, do you have to do it yourself?

It's easy to implement backspace.

);Press the backspace key of your keyboard.

No waiting, that's it.

It's all so clear.

How do you implement keyboard input?

It's the same, but with a different character encoding.

Use the keypress event to determine what is entered according to the characters in the event attribute of the event.

Do you want to learn C now? Learn together, learn together

Add under the launch window:

Launch the window. Get Focus ().

Then add your keypad case**.

In addition, you have to consider that when the mouse presses the button in the startup window, the button will automatically get the focus, so at this time, it is invalid when you use the keypad to type, so when you need to use the keypad regardless of the focus position, you can only add your keypad to each control on the startup window**.

Press the Backspace key to remove the wrong number.

Press next to the keypad to move the cursor.

There is a small protrusion on the numeric key area of the keyboard with a 5, that is the reference key, you should try to keep your wrist still, use your fingers to tap, and practice more to be OK.

The one above is right, generally just use the middle finger, real finger, ring finger, put the middle finger on top of the 5, the wrist does not move, the three fingers do not move down to tap OK, but you still have to practice more!