求助: WM_CREATE中使用this指针.

[fanjunwu]

我想在WM_CREATE中使用this指针.
代码这样?
MDICREATESTRUCT mdi;
SecureZeroMemory(&mdi,sizeof(MDICREATESTRUCT));
mdi.lParam = (LPARAM)this;
//
hThisWnd = CreateMDIWindow(WndClasName.c_str(),
WndTitle.c_str(),NULL ,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
hThisWndParent,hInstance,(LPARAM)&mdi);

窗口过程中这样处理.
case WM_NCCREATE:
{
assert( ! IsBadReadPtr((void *) lParam,sizeof(CREATESTRUCT)) );
MDICREATESTRUCT * pMDIC = (MDICREATESTRUCT *)(((LPCREATESTRUCT) lParam)->lpCreateParams);
psd = (ps::CPickSecondDataFormHtml *) (pMDIC->lParam);
//assert( ! IsBadReadPtr(psd, sizeof(ps::CPickSecondDataFormHtml)) );
SetWindowLongPtr(hWnd, GWL_USERDATA, (LONG_PTR)psd);

结果发现pMDIC->lParam 并不等于this (mdi.lParam = (LPARAM)this;)这是为何?
想了半天.也不明白.请高手指点.

[太乙]

没太明白啥意思，友情up~~

[jia_xiaoxin]

When the MDI child window is created, the system sends the WM_CREATE message to the window. The lParam parameter of WM_CREATE contains a pointer to a CREATESTRUCT structure

求助:WM_CREATE中使用this指针
可是你的程序中用的是 case WM_NCCREATE:

[fanjunwu]

WM_NCCREATE比WM_CREATE 消息早到.所以我在wm_nccreate中处理了.不过.我试过,在wm_create中也一样.
就是Createstruct结构转换成mdicreatestruct结构时.里边的lparam就变了.还是原来的赋值的lparam值了.
我重新写了个程序.可以.并且是多线程的.
会不会和程序是多文档有关啊.