Posting messages between process with string data

Question

Is there any safe way to PostMessage() string data between processes. WM_COPYDATA cannot be used since it should not be posted.

Why can't I PostMessage the WM_COPYDATA message, but I can SendMessageTimeout it with a tiny timeout?

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Thanks, Renjith V R

Answer 1

This may not be the right approach..but will work

as you are able to PostMessage between two processes, so just before posting the message , write the data into an .INI file and once the other process receives the message it can read the same .INI file. 

Answer 2

On 5/21/2015 9:22 AM, "Renjith V Ramachandran" wrote:

Is there any safe way to PostMessage() string data between processes.

No, but there are many other inter-process communication mechanisms available. You could, for example, write the string to a block of shared memory, then post a message to the target process to let it know it can go read it.

https://msdn.microsoft.com/en-us/library/windows/desktop/aa366551.aspx

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Igor Tandetnik

Answer 3

On 5/21/2015 9:22 AM, "Renjith V Ramachandran" wrote:

Is there any safe way to PostMessage() string data between processes.

No, but there are many other inter-process communication mechanisms available. You could, for example, write the string to a block of shared memory, then post a message to the target process to let it know it can go read it.

https://msdn.microsoft.com/en-us/library/windows/desktop/aa366551.aspx

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Igor Tandetnik

Currently i am using shared memory. But synchronization creates some problem mentioned here

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Thanks, Renjith V R