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Additional WindowStyle: HideInTaskbar

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Don't know if this is needed for other os than windows but if you create a child window it might be useful to not show it in the taskbar like for tooltips or like UAK does it with the combobox. A hack to achieve this is doing the following:

_window = CreateWindow("", 0, 0, 0, 0, displays[0], WindowStyles::WINDOW_HIDDEN | WindowStyles::WINDOW_CHILD);
SetWindowLongA(_window->GetHandle(), GWL_EXSTYLE, (GetWindowLong(_window->GetHandle(), GWL_EXSTYLE) | WS_EX_TOOLWINDOW) & ~WS_EX_APPWINDOW);


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Give this a try:

#include "UltraEngine.h"

using namespace UltraEngine;

int main(int argc, const char* argv[])
    //Get the display
    auto displays = GetDisplays();
    Vec2 displayscale = displays[0]->GetScale();

    //Create a window
    auto window = CreateWindow("Example", 0, 0, 400, 300, displays[0], style);
    auto child = CreateWindow("Child", 100, 100, 400, 300, window, style | WINDOW_TITLEBAR);

    //Main loop
    while (window->Closed() == false)
        if (window->KeyDown(KEY_ESCAPE)) break;
    return 0;


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