exact code to see graphics on 480×320 TFT LCD

I want to see image on LCD screen. i converted the image to bitmap file and array c file. I tried to see using code
extern unsigned int arm1[];
tft.drawBitmap(20, 1, 126,126, arm1, 1);
but it is showing drawBitmap is not declared in the scope.

can someone help me out with this?

It is very hard to troubleshoot code that we cannot see. Read the how to use this forum-pease read stickies to see how to post code and error messages.