激活热键组合后如何正确模拟键盘事件

Question

I have a program that registers a certain hotkey combination for activation. For the purpose of this question, let's say this hotkey is Ctrl + Alt + D. Once the combination is pressed, my program will then simulate some other keyboard events to the active window using SendInput, for example, it could simulate Ctrl + A. My issue is that the simulation of Ctrl + A doesn't work properly since (I think) the Ctrl key is still pressed from the hotkey combination. One of the solutions I'm thinking to do is to send Key Up events for every key in my hotkey combination and then simulate Ctrl + A, however I wanted to check if this is the proper way of handling it?

Answer 1

First, understand that questions asking how to send keyboard messages are asked very often. I assume you have not invested much time looking for previous answers. Second, understand that beginners often mistakenly think that sending keyboard messages is the easiest and most effective solution. The truth is that it is usualy not the easiest and is not the most effective and not the most reliable.

If you are going to work with Windows messages like that, then learn to use Spy++. If you do not know what that is, then please invest a minute by familiarizing yourself with the tools available in the VS Tools menu.

A likely easier, more efective and reliable solution usually is to use the WM_GETTEXT and WM_SETTEXT messages. And anticipating future questions, to push a button in another application send a BN_CLICKED notification to the parent of the button. You can use Spy++ to get many more answers to questions of messages.

Using SendInput might be the best solution for you, but there is not enough of your requirements provided to say for sure. In my opinion, SendInput should be the last resort and used only when the other possibilities are not possible. Please spend some time reading some of the numerous articles and previous answers relevant to the question.