DrawButton problem

[ChanceOfHax]

Ok guys.
I made a func to draw a button and it have hover effe*** and click effects.
But hwen i try to change a hack variable from 0 to 1(hack =! hack)
than it dont work.

My code:

void DrawButton(int x, int y, int h, D3DCOLOR BorderColor, D3DCOLOR FillColor, char* Caption, int hack, LPDIRECT3DDEVICE9 pDevice)
{
	gets (Caption);
	if(isMouseinRegion(menux+x,menuy+y,menux+x+strlen(Caption)*6,menuy+y+h) && !GetAsyncKeyState(VK_LBUTTON))
	{
		DrawBox(menux+x, menuy+y, strlen(Caption)*6, h, TransGrey, BorderColor, pDevice);
		DrawString(menux+x+3, menuy+y+h/6, White, Directx_Font, Caption);
	}
	else if(isMouseinRegion(menux+x,menuy+y,menux+x+strlen(Caption)*6,menuy+y+h) && GetAsyncKeyState(VK_LBUTTON))
	{
		DrawBox(menux+x, menuy+y, strlen(Caption)*6, h, Yellow_a, BorderColor, pDevice);
		DrawString(menux+x+6, menuy+y+h/4, White, Directx_Font, Caption);
		hack = !hack;
	}
	else if(!isMouseinRegion(menux+x,menuy+y,menux+x+strlen(Caption)*6,menuy+y+h))
	{
		DrawBox(menux+x, menuy+y, strlen(Caption)*6, h, FillColor, BorderColor, pDevice);
		DrawString(menux+x+3, menuy+y+h/6, White, Directx_Font, Caption);
	}
}

and my call:

DrawButton(10, 10, 20, White, TransBlack, "lol", lol, pDevice);

Why my vaiable dont change?!