Closing a window with DestroyWindow() not working.

[ExSanity]

I am messing around with some windows functiosn and i am trying to close the current window i am tabbed into yet for some reason it doesn't work and it didn't return an error
My Code:

int main()
{
	HWND curwind;
	char ccurwind[256];
	HWND newwind;
	HWND wind2;
	Sleep(1000);
	printf("Destroying in 5...\n");
	Sleep(1000);
	printf("Destroying in 4...\n");
	Sleep(1000);
	printf("Destroying in 3...\n");
	Sleep(1000);
	printf("Destroying in 2...\n");
	Sleep(1000);
	printf("Destroying in 1...\n");
	curwind = GetForegroundWindow();
	GetWindowTextA(curwind, ccurwind, 256);
	//DestroyWindow(curwind);
	if (DestroyWindow(curwind) == 0) {
		printf("Failed with error: %s", GetLastError());
	}
	else {
		printf("\nDestroyed %s", ccurwind);
	}
	getch();
    return 0;
}