Is it possible to type in uppercase when using Virtual Key Codes?

Is there any function that can make Virtual Key Codes type in uppercase?

This is the code I'm using

int main(){
keybd_event(0x41, 0, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(0x41, 0, KEYEVENTF_KEYUP, 0);
return 0;}