到目前为止,我已经想出了如何使用Typelib将Unicode字符串bSTR传递给Euphoria DLL。到目前为止,我无法弄清楚如何创建和传回一系列BSTR。
我到目前为止的代码(以及用于EuCOM本身和Win32lib部分的include
):
global function REALARR()
sequence seq
atom psa
atom var
seq = { "cat","cow","wolverine" }
psa = create_safearray( seq, VT_BSTR )
make_variant( var, VT_ARRAY + VT_BSTR, psa )
return var
end function
类型库的一部分是:
[
helpstring("get an array of strings"),
entry("REALARR")
]
void __stdcall REALARR( [out,retval] VARIANT* res );
测试代码,在VB6中是:
...
Dim v() as String
V = REALARR()
...
到目前为止,我设法得到的是来自DLL的错误'0'。有任何想法吗?任何人吗?
答案 0 :(得分:1)
您应该使用create_safearray()
功能。它在Utilities下记录(隐藏?)。基本上,将您的BSTR指针放入序列并将其传递给create_safearray()
:
sequence s, bstrs
s = {"A", "B"}
bstrs = {}
for i = 1 to length(s) do
bstrs &= alloc_bstr( s[i] )
end for
atom array
array = create_safearray( bstrs, VT_BSTR )
...
destroy_safearray( array )
答案 1 :(得分:0)
我通过forum与幸福感人物保持联系,并且已经走到了尽头。例程在make_variant行上失败。我还没有想到它,也没有它们。
global function REALARR()
atom psa
atom var
atom bounds_ptr
atom dim
atom bstr
object void
dim = 1
bounds_ptr = allocate( 8 * dim ) -- now figure out which part is Extent and which is LBound
poke4( bounds_ptr, { 3, 0 } ) -- assuming Extent and LBound in that order
psa = c_func( SafeArrayCreate, { VT_BSTR, 1, bounds_ptr } )
bstr = alloc_bstr( "cat" )
poke4( bounds_ptr, 0 )
void = c_func( SafeArrayPutElement, {psa, bounds_ptr, bstr})
free_bstr( bstr )
bstr = alloc_bstr( "cow" )
poke4( bounds_ptr, 1 )
void = c_func( SafeArrayPutElement, {psa, bounds_ptr, bstr})
free_bstr( bstr )
bstr = alloc_bstr( "wolverine" )
poke4( bounds_ptr, 2 )
void = c_func( SafeArrayPutElement, {psa, bounds_ptr, bstr})
free_bstr( bstr )
make_variant( var, VT_ARRAY + VT_BSTR, psa )
return var
end function
答案 2 :(得分:0)
好的,var
尚未初始化。并不重要,因为例程仍然崩溃。然而,人们需要一个
var = allocate( 16 )
就在make_variant
之前