在NSIS中调用dll函数并返回布尔值

时间:2019-02-22 06:19:24

标签: c dll syntax nsis

我试图在dll中调用该函数,但失败。 这是我的NSIS脚本:

!include "LogicLib.nsh"
Section "MyTest"
Strcpy $0 "abc"
System::Call 'MyDll::FindSomething(t, b) i(r0, false) .r1'

${If} $1 == true
    MessageBox MB_OK "1"
${ElseIf} $1 == false
    MessageBox MB_OK "0"
${EndIf}
SectionEnd

FindSomething函数应返回布尔值true或false。执行后,脚本的结果什么也没显示。

1 个答案:

答案 0 :(得分:0)

  • 您不是要提取MyDll.dll吗?

  • false不是受支持的关键字,请使用0

没有C / C ++声明,很难给出完整的示例,但是我可以尝试:

Section
InitPluginsDir
File "/oname=$PluginsDir\MyDll.dll" "c:\myfiles\MyDll.dll" ; Extract

System::Call 'KERNEL32::AddDllDirectory(w "$PluginsDir")' ; Make sure we are allowed to load from here

System::Call 'KERNEL32::LoadLibrary(t "$PluginsDir\MyDll.dll")p.r9'
MessageBox mb_OK "Loaded MyDll at address $9" ; This should not be 0!

; bool __cdecl FindSomething1(char* p1, bool p2):
StrCpy $0 "abc"
System::Call 'MyDll::FindSomething1(m r0, b 0)b.r1 ?c'
MessageBox mb_OK "Returned $1"

; int WINAPI FindSomething2(LPTSTR p1, BOOL p2):
StrCpy $0 "abc"
System::Call 'MyDll::FindSomething2(t r0, i 0)i.r1'
MessageBox mb_OK "Returned $1"
; ${If} $1 <> 0 ...

System::Call 'KERNEL32::FreeLibrary(p r9)'
SectionEnd

只有最新版本的System插件支持b类型,但无论如何您都可以在大多数地方使用i