Any help please with ShellExecuteA

I have a button that has an action of ShellExecuteA(0,"Open",ConcatMaterialCode,"","",1) ConcatMaterialCode being an images number to open . this opens a specific image within the program folder this works well – I now want to make it open a folder within the program folder .

Something like ShellExecuteA(0,"Open" ImagesFolder ,ConcatMaterialCode,"","",1) This would then go to the program folder and open an image within the Image folder