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C# Prevent mouse over effects in other applications

I'm writing a screen shot app where I need to prevent the mouse over effect in all windows. For example, when hovering over a button or hyperlink they will often change color as a form of feedback. My goal is to take a screen shot where the user clicks without the additional feedback.
I can see two approaches:
Disable / ignore the system cursor and create my own. Allow it to fly around the screen without triggering any hover effects. Send a mouse_event when the user clicks using winuser.h
Use a semi-transparent topmost WPF window that allows clicks pass through to other windows. THis answer feels close, but does trigger hover over effects in other windows.
Option 1 is feasible, but I would need to also account for right clicking and scroll wheel.
Option 2 would be best if I could pass through the click event and not the mouse movement. Is this possible in WPF or should I roll my own cursor controls?
Thanks!

Capture all Keyboard input, regardless of what control has focus in Windows Form applicaion

We are using the windows form application on a tough pad (touchscreen device).
want to show the on screen key board when user click the text box or any input control , rather then handling this event is there any way to handle this on the application level to show and hide the windows on screen keyboard

DevExpress editors, as well as regular .NET editors, do not affect OnScreenKeyboard's behavior. I suggest that you use one of the approaches described here to display it - Automatically pop up tablet touch keyboard on WinForms input focus.

Winforms Rich Textbox allow scrolling when mouse over

I have simple chat application with Rich Textbox to display messages and Textbox to write them. I'd like to have same behaviour as facebook chat does, which is having focus on the Textbox but being able to use mouse wheel to scroll the one I'm hovering over. So as an example: I'm writting something in the Textbox but in the meantime I want to scroll the Rich Textbox upwards by using my mousewheel without loosing focus on the Textbox. Facebook chat has this exact behaviour.
Semi pseudo code I came up with:
private void richTextBox_MouseOver(object sender, EventArgs e)
{
MouseWheelScroll -> richTextBox scroll, msgTextBox don't scroll
}

I confirm Dmitriy Zapevalov's insight, Windows 10 Operative System
has a new interesting feature:
Scroll inactive windows when I hover over them
This is exactly the behaviour you desire, I can confirm it works both
in Winform and WPF application and in general it is the behaviour of
any window I see on my monitor. It is enabled by default, user can
disable it.
It is a little bit tricky to reproduce that on c# applications
running on windows Xp, Vista, 7 or Windows 8, you can find that issue solved in C++ here and in manuell answer here

How to move my form when on screen keyboard is shown

Im trying some different alternatives for onscreen keyboard for our desktop application that is being run on a windows 8 tablet without keyboard.
So far Tabtip.exe have been working best but im open to other solutions.
The problem i have is when the user clicks on a textbox in the application and i show the onscreen keyboard, the keyboard hides the textbox.
How do fix this in a good way?
Is it something that windows can handle automatically? Some applications like outlook and word gets a "splitscreen" with a scroll bar in the upper part where the applications is and the keyboard in the lower part. I want a solution like that to. How do they do it?
One solution could be to always move my window up a set amount of pixels that is the same as the keyboard height. But i don't want to move the application if the keyboard doesn't cover the textbox.
But how do i determine how high the keyboard is? is it always the same height? How do i detect where the window is?
Any other solutions?

Disable keyboard shortcuts

Using C#, I made a form maximized without showing the toolbar, but I need to disable all keyboard shortcuts (Alt+F4, Ctrl+Shift+Esc, etc) including Ctrl+Alt+Del. Can I do this?

You might want to use OnPreviewKeyDown (in WPF) event. Where you can identify what user entered and control based on key combinations.