Message issue about mouse down and mouse release in VC

This one. It's not clear whether there are specific correlation functions, but there are methods, which may be more troublesome.

Each button has a CRECT, so that when you press the mouse, you will have a coordinate, and you can judge whether this coordinate is in this rect or not. In the same way, there is also a coordinate when the mouse is released.

It is important to note the issue of coordinate conversion.

Also, the mouse message response function is lbuttondown or something.

The bit masking of the display region mouse message and the display region mouse message wparam are:

mk lbutton press the left button.

mk mbutton: press the middle button.

Right-click on the mk rbutton.

mk shift: press the shift key.

MK Control: Press the Ctrl key.

Find your dialog resource.

Click the dialog box right-click and pop up an option called event (called event in the Chinese version);

Find wm lbuttondown (left click down), wm lbuttondown, etc., in the list, check, and then there is no add and edit, add and (or double-click the selected item, in the right list box and then double-click which event you just double-clicked), automatically jump to the corresponding function, the following is to add your own processing**。。

The button message should be onclick. It's not onlbuttondown these functions.

Add ** to functions such as onlbuttondown(), onrbuttondown(), onlbuttonup(), etc., I suggest you find an example to take a look. For example, an MFC drawing program.

Go to the class properties and add a handler to them!

In the Create Class Wizard, there is WM Lbuttondown, a type of message, which can be generated as a function.

This problem you can't capture the press and lift function of this control in the wm lbuttondown function of the window, because this control covers the window, and it is impossible to capture this window function when you click on the control, I know that the way is that you have to customize a subclass derived from this control class, and then implement what you want to implement from the wm lbuttonup function of this subclass, and the control you add must be of this subclass type. If it's a control on the dialog box, you want to associate this control with a subtype of variable, if it's a normal view, the control you dynamically generate is of this subclass type, it should be clear, and you can ask again if you don't understand anything.

It is recommended that you process it in wm lbuttonup, and first get the size rect of the control in it;

Then determine whether the bounced point is in the rect area.

You can use ontimer to do this, create ontimer when onlbuttondown, kill ontimer when onlbuttonup, and then use ontimer to call the function.

This is where you have to use the mouse hook...

If you want to take a screenshot, you can create a transparent form that fills the entire screen.

The question you asked is the question I want to know now, can you solve it now?

Do you want VB mouse to press and bounce events? Or is it an API mock event? Both are for you.

1。The first type:

When the mouse is pressed and the mouse is bounced, the pieces are: mousedown, mouseup events.

Copy the following into the form, and create a new command1 and command2 buttons, and below them are events.

private sub form_mousedown(button as integer, shift as integer, x as single, y as single)

falsetrueend sub

private sub form_mouseup(button as integer, shift as integer, x as single, y as single)

true false

end sub

The test is complete. 2.The second is to simulate the process of mouse pressing and popping up in the background.

Declare the api function mouse message mouse event

private declare sub mouse_event lib "user32" alias "mouse_event" (byval dwflags as long, byval dx as long, byval dy as long, byval cbuttons as long, byval dwextrainfo as long)

Let's create a new command1 button to copy ** into.

private sub command1_click()

mouse_event mouseeventf_leftdown or mouseeventf_leftdown, 0, 0, 0, 0 'Simulates a left-click press.

mouse_event mouseeventf_leftdown or mouseeventf_leftup, 0, 0, 0, 0 'Simulates the left mouse button lifted.

end sub

Typing word by word, it is not copying and pasting others. Give points.

If the time to click the mouse and release it is mouseup If it is to move the mouse away from the button or control, there is no special time (to enter the mousemove) to leave, and you can only judge whether it is within the coordinate value of the button or control according to the current coordinate value of the mouse. If you are in, you have not left. If you don't anymore, leave.

You can use a timer to cycle through the detection all the time. When the mousemove event is fired, when the coordinates are out of the control range. then the mouse leaves. And then.

This is the train of thought. Try it yourself. Forget to adopt.

1.There is no need to make hooks.

2.There's no need to get the mouse up message, no matter what message you need to respond to in the widget.

3.If you don't understand, please continue to ask.

There is no news on this, but such a feature can be programmed.

In the message processing function of the left-click press, you can determine whether the email is pressed.