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Hi!
I have Win32 API (cloud filter api). On Windows 10 x64 it does not work when I create x64 app and pass IntPtr to it's function . (I have access violation memory exception).
But when I build x86 app and use IntPtr with 32 length it works.
So my question is: win32 api is 32 bitness API and can work only with pointers with 32 bits length, is it true ?
On 64-bit Windows (with a 64-bit application), pointers are 64-bit.
You'll have to give some more details about what you're doing. Presumably there's something amiss somewhere.
I am using cloud filter api inside my .net application.
And when I call cfexecute function and passing there structure with a pointer inside it correctly works only when application platform is x86.
But when I am doing the same with x64 build platform it throws exception access violation memory.
Make sure that your managed code is actually running as 64-bit code. An IntPtr is 32-bits in 32-bit code and 64-bits in 64-bit code.
Check to make sure that you are not building managed code for AnyCpu with prefer 32-bits selected.
It works only when I am selecting building with prefer 32 bits.
Otherwise it will not work. Checked and sure about it.
An access violation can result for any number of reasons. Chances are that there is a problem in the code that is exposed when building for x64.
So can you please tell, can Win32 API use pointers with 8 bytes size ?
As already stated, pointers in 64-bit code are 64-bits and pointers in 32-bit code are 32-bits.
Hello @Diakov Dmytro ,
CfExecute API works well with 64 bit length pointers on 64 bit system in C++. You can test official sample: CloudMirror and get pointer size using sizeof(). The following snapshot shows an example and its result.
Thank you!
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Hello @Rita Han - MSFT ,
thanks for your answer.
Yes, CfExecute works fine when passing pointer to single object.
But it fails when passing pointer to array.
You really need to post the relevant snippets of code to provide the community with details.
As @RLWA32 pointed out, if you can share related code we can do a further investigation.
As RLWA32 points out - ensure all aspects of your application are x64.
When all aspects are using x64 or AnyCpu on x64 bit machine - it does not work.
When all aspects are using x86 on x64 bit machine - it works.
All I can say is that you're going to need to delve deeper to find the underlying source of the problem you have.
So can you please tell, can Win32 API use pointers with 8 bytes size ?
Yes, although it's called "Win32", on a 64-bit Windows OS with a 64-bit application, pointers are 8 bytes.
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