Answer / Ankit Agrawal

To check whether a Windows DLL is 32-bit or 64-bit, you can use the `IMAGE_FILE_MACHINE` structure defined in the WinNT.h header file. Here's an example code snippet using Visual C++:
```cpp
#include <windows.h>
#include <stdio.h>

BOOL Is32BitDll(const char *dllPath) {
IMAGE_FILE_HEADER imageFileHeader;
HANDLE file = CreateFileA(dllPath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

if (file == INVALID_HANDLE_VALUE) {
return false;
}

DWORD fileSize = GetFileSize(file, NULL);
ReadFile(file, &imageFileHeader, sizeof(IMAGE_FILE_HEADER), NULL, NULL);

CloseHandle(file);

return (imageFileHeader.Machine == IMAGE_FILE_MACHINE_I386); // returns true for 32-bit DLL
}
```

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