If you wanna Inject your Code at Runtime,yes... But..

Its very uncommon that after a Section (here Code one) comes JunkData..Prolly a new Section starts wich is needed to run the Exe proper..

You could go and check for some Space to inject Stuff after the Section Infos -> Start of first Section...

Or maybe smash your Code into 0 Bytes of the last Section (if there are any)...

You will have to set correct flags with VirtualProtect,otherwise u will prolly fail at your Attemp...

Can you explain a bit more what you wanna inject,and how do u call your injected Code etc.?

Probably easier to sort the Problem then

Cheers