How to include _T type in C++?

[h4ever]

How to include _T type in C++?

U have small code where it is used but missing the correct files to include

void main(int argc, char ** argv){
	HWND hWnd = FindWindow(NULL, _T("My chat") ); // get window handle
	WindowCapture cap(hWnd);
	cv::Mat dst;
	cap.captureFrame(dst);

All I found is this link https://msdn.microsoft.com/en-us/library/c426s321.aspx
but they dont write how to include it

[Thomas1965]

#include <tchar.h>

[h4ever]

Thank you.