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Thread: How to read the value of a function API Win32 ???

  1. #1

    How to read the value of a function API Win32 ???

    Hello, I am new to the forum
    I'm starting to use ThinBasic, I also use FreeBasic.

    I have this code but it gives me an error.
    I need to do it like this to later call some non-windows DLLs.

    '-----------------------------------------------
    Uses "Console"

    Declare Function timeGetTime Lib "winmm.dll" () As Long

    PrintL (timeGetTime) '<--------- error here

    WaitKey
    '-----------------------------------------------

    Thank you very much in advance.
    Cheers
    Last edited by Tolo68; 06-06-2022 at 12:49.

  2. #2
    thinBasic author ErosOlmi's Avatar
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    Ciao,

    please indicate the Alias parameter in the Declare: https://help.thinbasic.com/declare.h...ghtsub=declare
    Alias name is the internal DLL name of the function.

    Also return value of the function is a DWORD: https://docs.microsoft.com/en-us/win...pi-timegettime

    '-----------------------------------------------
    Uses "Console"
    
    
    Declare Function timeGetTime Lib "winmm.dll" ALIAS "timeGetTime" () As dword
    
    
    PrintL (timeGetTime)
    
    
    WaitKey
    '-----------------------------------------------
    
    Let me know.
    Ciao
    www.thinbasic.com | www.thinbasic.com/community/ | psch.thinbasic.com
    Win10Pro 64bit - 8GB Ram - Intel i7 M620 2.67GHz - NVIDIA Quadro FX1800M 1GB

  3. #3
    Quote Originally Posted by ErosOlmi View Post
    Ciao,

    please indicate the Alias parameter in the Declare: https://help.thinbasic.com/declare.h...ghtsub=declare
    Alias name is the internal DLL name of the function.

    Also return value of the function is a DWORD: https://docs.microsoft.com/en-us/win...pi-timegettime

    '-----------------------------------------------
    Uses "Console"
    
    
    Declare Function timeGetTime Lib "winmm.dll" ALIAS "timeGetTime" () As dword
    
    
    PrintL (timeGetTime)
    
    
    WaitKey
    '-----------------------------------------------
    
    Let me know.
    Ciao

    Thank you very much, it went well for me, even with LONG instead of DWORD
    Cheers

  4. #4
    thinBasic author ErosOlmi's Avatar
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    Great.

    Yes LONG or DWORD are both 32 bits (4 bytes) numbers so calling WIN32 API function will not generate errors.
    But LONG is signed while DWORD is unsigned and have different number range.
    Here thinBasic numeric data types and their ranges: https://help.thinbasic.com/numericva...hlightsub=long

    Ciao
    Eros
    Last edited by ErosOlmi; 06-06-2022 at 18:52.
    www.thinbasic.com | www.thinbasic.com/community/ | psch.thinbasic.com
    Win10Pro 64bit - 8GB Ram - Intel i7 M620 2.67GHz - NVIDIA Quadro FX1800M 1GB

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