Detects if a DLL file is x64 or x86

For a DLL, how do we determine whether it is 32-bit or 64-bit, or is the platform of any CPU?

Visual Studio provides a good tool: CorFlags, which is embedded in the developer Command prompt. Use the following method, open Developer Command Prompt, enter the CorFlags commands, and enter a detailed path to the DLL, such as CorFlags C:\Temp\ Oracle.DataAccess.dll, you can see the results shown in the screenshot below.

What is the meaning of the result. In fact, we don't need to figure out what each field means. Here is a result comparison table, as long as we according to the results, to the table in comparison, we can draw the DLL is what platform.

Any CPU	PE32 with 32BIT = 0
x86	PE32 with 32BIT = 1
X64/itanium (IA-64)	pe32+ with 32BIT = 0

Look at the first screenshot, pe32+,32bit=0, so it's a 64-bit DLL.