John -- ChatGPT says about your post:
To correctly print the value stored at the address of a void * (in this case, the HANDLE) in C, you need to properly cast the void * to the appropriate type before dereferencing it. Since HANDLE is typically defined as void *, and assuming you're trying to print a 64-bit address (as suggested by the use of long long int), you should ensure that you are handling the correct data type.
If your intention is to print the value of the pointer (the address), %p will do that directly. However, if you want to print the value stored at that address, you must ensure that you're casting to the correct type that the HANDLE actually points to. If it's a pointer to a long long int, then your code should be correct. But this seems unusual for a HANDLE, which is more typically used as a pointer to a structure or some other object, not an integer.
If you simply want to print the address and then the value stored at that address assuming it points to a long long int, you would do something like this:
// Print the pointer value (address) and the value stored at that address
sprintf(p_msg, "outgoing ghwndTable pointer %p, value at address %lld", (void *)ghwndTable, *(long long int *)ghwndTable);
sprintf(p_msg, "outgoing ghwndEsc pointer %p, value at address %lld", (void *)ghwndEsc, *(long long int *)ghwndEsc);
However, if you're uncertain about what the HANDLE is actually pointing to, dereferencing it could lead to undefined behavior, including crashes. If you're only interested in printing the pointer itself (the address), you should not dereference it:
// Print the pointer value (address)
sprintf(p_msg, "outgoing ghwndTable pointer %p", (void *)ghwndTable);
sprintf(p_msg, "outgoing ghwndEsc pointer %p", (void *)ghwndEsc);
Handling Potential Crashes:
Ensure Correct Type: Confirm that ghwndTable and ghwndEsc actually point to long long int values before casting and dereferencing them. If they point to other data types, adjust your code accordingly.
Check for NULL Pointers: Before dereferencing the pointer, ensure it's not NULL:
if (ghwndTable != NULL) {
sprintf(p_msg, "outgoing ghwndTable pointer %p, value at address %lld", (void *)ghwndTable, *(long long int *)ghwndTable);
}
Use Appropriate Format Specifiers: Ensure that the format specifier matches the data type you're printing. For pointer addresses, use %p, and for long long int, use %lld.
If the crash persists even with these precautions, consider investigating whether the handle (HANDLE) is being prematurely closed or corrupted elsewhere in your code, particularly on the i5 laptop. Differences in system architecture, drivers, or OS configurations might also be influencing behavior.
