mfc中有不少的全域性函式,方便在不同物件中獲取不同的內容或建立不同的物件。主要全域性函式有:
afxwininit() afxbeginthread() afxendthread() afxformatstring1() afxformatstring2()
afxregisterclass()
這些函式從名稱上可見豹斑(功能)。
在afxwin.h中是這麼定義的:
afxgetmodulestate返回的是乙個:afx_module_state類的指標(afxstat_.h):
afx_module_state* afxapi afxgetmodulestate();
在afx_module_state類中定義了如下的成員變數:
// initialize cwinthread state
afx_module_state* pmodulestate = _afx_cmdtarget_getstate(); //看,宣告了乙個指標
afx_module_thread_state* pthreadstate = pmodulestate->m_thread;
assert(afxgetthread() == null);
pthreadstate->m_pcurrentwinthread = this;
assert(afxgetthread() == this);
m_hthread = ::getcurrentthread();
m_nthreadid = ::getcurrentthreadid();
// initialize wait cursor state
m_nwaitcursorcount = 0;
m_hcurwaitcursorrestore = null;
// initialize current printer state
m_hdevmode = null;
m_hdevnames = null;
m_nnumpreviewpages = 0; // not specified (defaults to 1)
// initialize dao state
m_lpfndaoterm = null; // will be set if afxdaoinit called
// other initialization
m_bhelpmode = false;
m_nsafetypoolsize = 512; // default size
}#ifdef _afxdll
#define _afx_cmdtarget_getstate() (m_pmodulestate)
#else
#define _afx_cmdtarget_getstate() (afxgetmodulestate())
#endif
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