HB_FUNC() : wParam, lParam = 0,0 for Macro

[Jimmy]

hi,

i try to use wParam, lParam = 0,0 as descript here
https://learn.microsoft.com/en-us/windows/win32/controls/lvm-getselectedcount

wParam
Must be zero.
lParam
Must be zero.

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  hb_retni( ListView_GetSelectedCount(hWnd,0,0)

but it fail when compile ... hm

it work when use only

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  hb_retni( ListView_GetSelectedCount(hWnd)

how is this possible

[Enrico Maria Giordano]

Because it is the correct macro prototype:

https://learn.microsoft.com/en-us/windows/win32/api/commctrl/nf-commctrl-listview_getselectedcount

[Jimmy]

Because it is the correct macro prototype:

uuups ...

i have read Description from LVM_GETSELECTEDCOUNT Message not from ListView_GetSelectedCount Macro

---

in HMG Source i found some AVOID_COMPILER_WARNING when using Listview Macro
HMG use

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  SendMessage ( hWnd, LVM_*, (WPARAM) x, (LPARAM) y)

instead which is like my Xbase++ Style using Ot4XB LIB

not sure if it belong to MinGW Compiler or also BCC / MSVC but it seems to work under Fivewin that Way

[Enrico Maria Giordano]

Code: Select all  Expand view

  SendMessage ( hWnd, LVM_*, (WPARAM) x, (LPARAM) y)

This is not tied to a particular compiler, this is the normal C cast (conversion to type).

[Jimmy]

hi Enrico,

This is not tied to a particular compiler, this is the normal C cast (conversion to type).

i talk about Macro which "might" make Problem so HMG use SendMessage() which also work under FiveWin BCC / MSVC

[Enrico Maria Giordano]

Ah, ok.