请教：如何在不同进程之间传递CALLBACK函数指针？急！！！

[leoleo]

如何在不同进程之间传递CALLBACK函数指针？
例如，
//callback function pointer declaration
typedef int (*ProcTest)();

APP_A.exe中实现
1.
//callback service routine
int DpsAddToGal()
{
//..
}
2.
//调用test.dll 的输出函数 exptest(ProcTest* ptest)传递函数指针；
exptest(DpsAddToGal)；

那么test.dll 的输出函数 exptest()接收了函数指针，并启动APP-B.exe，
如何将该函数指针传递给APP-B进程，从而在APP-B.exe中执行APP_A.exe的某些功能？

[mathe]

Different process may using different address for the same function. You should not using the fuction pointer of another function.
But you could use the relative address of the function.
in ProcA:
HANDLE hModule=GetModuleHandle("test.dll");
DWORD dwRelativeAddress=(DWORD)funpointer - (DWORD) hModule;
SendMessage(hWndOfAppB,WM_YOUR_MESSAGE,0,dwRelativeAddress);
in ProcB:
After receive the message, get relative address of function for lParam,then
HANDLE hModule=GetModuleHandle("test.dll");
funpointer=(FunType)((DWORD)hModule+lParam);
now you could call the function.