About *.lib *.h &*.dll

Question

Hi ,I have three files CH341DLL.H ,CH341DLL.LIB & CH341DLL.DLL ,I want to add #include directive to it in my source code for CH341DLL.H and for CH341DLL.LIB add it to linker with -|CH341DLL argument and for CH341DLL.DLL I've been told to place it in system32 but my OS is windows 10 64 bit. I don't know how to do these works.
Please help me.
Thanks

Answer 1

I've been told to place it in system32 but my OS is windows 10 64 bit. I don't know how to do these works.

It is bad practice to place user DLLs in the system folders. The best location for most user DLLs is in the folder that contains the application that uses them.

Answer 2

Put the .h + .lib with your other sources
+
the .dll in the executable directory.

Answer 3

You are executing code from a third-party DLL. If the functions you are calling are not returning the expected results then either your expectations are incorrect or errors exist in the way you are using the functions.

In any case, you need to refer to the documentation of the functions exported by CH341DLL.DLL to resolve the specific issues that you are experiencing when using this third-party software.

Answer 4

If you place the .lib file with your other source you need to instruct the linker how to find it.
One way is the include a statement like this in the source code -

    #pragma comment(lib, "CH341DLL.lib")  

Another way is to set the "Additional Dependencies" property in the project's Linker->Input.

Go to the property sheet and click the down arrow (highlighted in red)

Then, if you placed your .lib file in the same folder as your sources (which should be the project folder containing the .vcxproj file) set the following

Now the property page should look like this

Accept the settings and close the property page.

Answer 5

I'd used declare statement in my code:
Private Declare Function CH341OpenDevice Lib "CH341DLL.DLL" (ByVal iIndex As Integer) As Integer
Private Declare Function CH341WriteI2C Lib "CH341DLL.DLL" (ByVal iindex As Integer, ByVal idevice As Integer, ByVal iaddr As Integer, ByVal ibyte As Integer) As Boolean
Private Declare Function CH341ReadI2C Lib "CH341DLL.DLL" (ByVal iindex As Integer, ByVal idevice As Integer, ByVal iaddr As Integer, ByVal obyte As Integer) As Integer
Private Declare Function CH341CloseDevice Lib "CH341DLL.DLL" (ByVal iIndex As Integer) As Integer
Private Declare Function CH341ResetDevice Lib "CH341DLL.DLL" (ByVal iIndex As Integer) As Integer
Sub main()
MsgBox("ok")
End Sub

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    Dim opening As Integer
    Dim closing As Integer
    Dim writing As Integer
    Dim reading As Integer
    Dim reseting As Integer
    reseting = CH341ResetDevice(0)
    opening = CH341OpenDevice(0)
    writing = CH341WriteI2C(0, 86, 22, 90)
    reading = CH341ReadI2C(0, 48, 91, 91)
    closing = CH341CloseDevice(0)
    MsgBox(reseting)
    MsgBox(writing)
    MsgBox(closing)
End Sub

But when I run the code it returns value of CH341WriteI2C() wrong(for example zero).