InterProcess Communication
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Hello, I am trying to send a message across processes. However, the message is not successfully sent. Here is what happens: a) If the process (from which message is to be sent) is not elevated, then GetLastError returns 5 which means access error. b) If the process (from which message is to sent) is elevated, then the message is sucessfully sent. Now the problem is I cannot elevate the process. Is there any work around or possible solution. Thanks.
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Hello, I am trying to send a message across processes. However, the message is not successfully sent. Here is what happens: a) If the process (from which message is to be sent) is not elevated, then GetLastError returns 5 which means access error. b) If the process (from which message is to sent) is elevated, then the message is sucessfully sent. Now the problem is I cannot elevate the process. Is there any work around or possible solution. Thanks.
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I think you need to indicate what o/s, what version of c++, and how you are sending the message - eg postmessage, sendmessage, carrier-pidgeon for others to help/make sense of your request 'g'
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I think you need to indicate what o/s, what version of c++, and how you are sending the message - eg postmessage, sendmessage, carrier-pidgeon for others to help/make sense of your request 'g'
OK. Here are the details: I am using Windows Vista. I am developing the application using VS 2005 (C++). I have tried PostMessage & SendMessage. Both have same behavior in both cases. Thanks.
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Hello, I am trying to send a message across processes. However, the message is not successfully sent. Here is what happens: a) If the process (from which message is to be sent) is not elevated, then GetLastError returns 5 which means access error. b) If the process (from which message is to sent) is elevated, then the message is sucessfully sent. Now the problem is I cannot elevate the process. Is there any work around or possible solution. Thanks.
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Identity Undisclosed wrote:
Is there any work around or possible solution
Use a different IPC mechanism (named pipe, shared memory + mutex or event or something)?
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
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Hello, I am trying to send a message across processes. However, the message is not successfully sent. Here is what happens: a) If the process (from which message is to be sent) is not elevated, then GetLastError returns 5 which means access error. b) If the process (from which message is to sent) is elevated, then the message is sucessfully sent. Now the problem is I cannot elevate the process. Is there any work around or possible solution. Thanks.
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You're seeing the correct behavior. UIPI blocks messages sent from a lower-integrity process to a higher-integrity process. If you control the receiving process, you can call
ChangeWindowMessageFilter()to allow the message through.--Mike--
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OK. Here are the details: I am using Windows Vista. I am developing the application using VS 2005 (C++). I have tried PostMessage & SendMessage. Both have same behavior in both cases. Thanks.
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Look at the WM_COPYDATA message. See: Inter-Process Communication using WM_COPYDATA[^]
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