Transparent SFML Window

transparent_sfml.cpp

#include <SFML/Graphics.hpp>
#include <Windows.h>
#include <Dwmapi.h>

#pragma comment (lib, "Dwmapi.lib")


int main()
{
	sf::RenderWindow window(sf::VideoMode(1280, 720), "Transparent Window");
        window.setFramerateLimit(60);
        
        MARGINS margins;
	margins.cxLeftWidth = -1;
        
        SetWindowLong(window.getSystemHandle(), GWL_STYLE, WS_POPUP | WS_VISIBLE);
        DwmExtendFrameIntoClientArea(window.getSystemHandle(), &margins);
        
        
        //CircleShape for DemoContent
        sf::CircleShape shape(360.f);
	shape.setFillColor(sf::Color::Green);
        //\
        
     sf::Vector2i grabbedOffset;
	bool grabbedWindow = false;
	while (window.isOpen())
	{
		sf::Event event;
		while (window.pollEvent(event))
		{
			if (event.type == sf::Event::Closed || event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Escape)
				window.close();
			else if (event.type == sf::Event::MouseButtonPressed)
			{
				if (event.mouseButton.button == sf::Mouse::Left)
				{
					grabbedOffset = window.getPosition() - sf::Mouse::getPosition();
					grabbedWindow = true;
				}
			}
			else if (event.type == sf::Event::MouseButtonReleased)
			{
				if (event.mouseButton.button == sf::Mouse::Left)
					grabbedWindow = false;
			}
			else if (event.type == sf::Event::MouseMoved)
			{
				if (grabbedWindow)
					window.setPosition(sf::Mouse::getPosition() + grabbedOffset);
			}
		}

		window.clear(sf::Color::Transparent); //F*ck yeah it works as you would expect from the wording ;P
		window.draw(shape);
                window.display();
        }
        return 0;
        
}

link against? You mean i have to link dwmapi.dll in the def file? Also i am using Visual Studio Code. So i have to add the dll? where do i finde it?

Ah thanks i think i figured out what you ment. I added -ldwmapi to the command to compile and it worked. Thank you all! and for the Code.

I don't understand why I can't get the partial transparency effect to function!

I wanted to debug the issue of why using GloSI gives me black screen instead of transparent layer but not even the simplest code works.

Tried this and many other examples with latest SFML on a new Vstudio solution. On Windows 11.