quick question on windows API

This is a discussion on quick question on windows API within the Windows Programming forums, part of the Platform Specific Boards category; Do you people who program with Windows use SendMessage and PostMessage a lot? Or are these things that you CAN ...

  1. #1
    Unregistered Leeman_s's Avatar
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    quick question on windows API

    Do you people who program with Windows use SendMessage and PostMessage a lot? Or are these things that you CAN do, but there is no real need for them a lot.

  2. #2
    &TH of undefined behavior Fordy's Avatar
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    Re: quick question on windows API

    Originally posted by Leeman_s
    Do you people who program with Windows use SendMessage and PostMessage a lot? Or are these things that you CAN do, but there is no real need for them a lot.
    :: Taps Monitor ::

    "Hello!!?? Windows Board??!?"

    Yeah, I use SendMessage a lot to communicate with controls.....PostMessage not as much

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    Guest Sebastiani's Avatar
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    I think the only difference between the two is that SendMessage blocks while PostMessage returns immediately. But yes, used quite a lot...
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  4. #4
    Code Monkey Davros's Avatar
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    Messages are a way of allowing communication between different processes, running in different threads. The Windows message API may seem complicated, but I don't see a better way of doing things.

    All (non-console) windows applications use messages at some level. How do you think mouse movements, mouse clicks, key presses are forwarded to the application?

    Personally, I use Borland BCB, which hides alot of the implementation of messages. However, underneath its just handling messages for me.

  5. #5
    Registered User MicroFiend's Avatar
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    Without the SendMessage API call... thr would be no abillity to totally mess up window objects and make em look like all kind of wierd controls at runtime.... think of the lack of fun you would have or am i the only one who is sad enough to send buttons loadsof wierd messages making em act like text fields :?

  6. #6
    Guest Sebastiani's Avatar
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    Messages are a way of allowing communication between different processes, running in different threads.
    True but not solely. It also allows your app to communicate with it's own objects in a non-blocking way. That is, were you to just manipulate a control directly, you would slow down the "multitasking" feel of your app. By sending messages, you are in a sense making your program multithreaded from within itself...


    Finally, console apps too are actually windows programs in disguise, and so they use the Windows message system just as heavily (unless compiled as DOS apps - my compiler won't even do that!).

    And Microfiend, yes, you are the only one
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  7. #7
    Carnivore ('-'v) Hunter2's Avatar
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    lol uhh, I don't think I've ever used either one of those functions... is that a bad thing, or is it just something I'll have to grow into? (like eating vegetables, for example )
    Just Google It. √

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  8. #8
    train spotter
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    I also tend to use the macros for specific types of controls from commctrl.h

    ie
    ListView_GetItemCount() instead of SendMessage and LVM_GETITEMCOUNT
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  9. #9
    It's full of stars adrianxw's Avatar
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    Use both all the time.
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