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// MainWindow (.h)
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class MainWindow : public WithmainLayout<TopWindow>
{
public:
	MainWindow();
	LineEdit txtSearch;
};


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// MainWindow (.cpp)
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#include "MainWindow.h"

MainWindow::MainWindow()
{
	CtrlLayout(*this, "MainWindow");
	
	// how to set Key(dword key, int count) event of txtSearch ?
	
}