Win32编程入门常识

# Win32编程入门常识
>BOOL CALLBACK DialogProc (HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)

过程函数类型为BOOL型回调函数!

大概调用过程如下(以内存中建立模态对话框为例(因为可以不涉及RC脚本文件而集中的写C代码):
```c
#include

#define ID_HELP   150
#define ID_TEXT   200

BOOL CALLBACK DialogProc (HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);
LRESULT DisplayMyMessage(HINSTANCE hinst, HWND hwndOwner,  LPSTR lpszMessage);
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
TCHAR buf[1024]="";
wsprintf(buf,"%d",sizeof(DLGITEMTEMPLATE));
   MessageBox(0,TEXT("sizeofDLGTMPLATE"),buf,0);
   DisplayMyMessage(hInstance,0,TEXT("aaa"));
   MessageBox(0,TEXT("shit"),0,0);
}

LPWORD lpwAlign(LPWORD lpIn)
{
    ULONG ul;

    ul = (ULONG)lpIn;
    ul +=3;
    ul >>=2;
    ul <<=2;
    return (LPWORD)ul;
}

LRESULT DisplayMyMessage(HINSTANCE hinst, HWND hwndOwner, LPSTR lpszMessage)
{
    HGLOBAL hgbl;
    LPDLGTEMPLATE lpdt;
    LPDLGITEMTEMPLATE lpdit;
    LPWORD lpw;
    LPWSTR lpwsz;
    LRESULT ret;
    int nchar;

    hgbl = GlobalAlloc(GMEM_ZEROINIT,1024);
    if (!hgbl)
        return -1;

    lpdt = (LPDLGTEMPLATE)GlobalLock(hgbl);

    // Define a dialog box.

    lpdt->style = WS_POPUP | WS_BORDER | WS_SYSMENU | DS_MODALFRAME | WS_CAPTION;
    lpdt->cdit =3;         // Number of controls
    lpdt->x  = 10;  lpdt->y  = 10;
    lpdt->cx = 100; lpdt->cy = 100;

    lpw = (LPWORD)(lpdt + 1);
    *lpw++ = 0;             // No menu
    *lpw++ = 0;             // Predefined dialog box class (by default)

    lpwsz = (LPWSTR)lpw;
    nchar = 1 + MultiByteToWideChar(CP_ACP, 0, "My Dialog", -1, lpwsz, 50);
    lpw += nchar;

    //-----------------------
    // Define an OK button.
    //-----------------------
    lpw = lpwAlign(lpw);    // Align DLGITEMTEMPLATE on DWORD boundary
    lpdit = (LPDLGITEMTEMPLATE)lpw;
    lpdit->x  = 10; lpdit->y  = 70;
    lpdit->cx = 80; lpdit->cy = 20;
    lpdit->id = IDOK;       // OK button identifier
    lpdit->style = WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON;

    lpw = (LPWORD)(lpdit + 1);
    *lpw++ = 0xFFFF;
    *lpw++ = 0x0080;        // Button class

    lpwsz = (LPWSTR)lpw;
    nchar = 1 + MultiByteToWideChar(CP_ACP, 0, "OK", -1, lpwsz, 50);
    lpw += nchar;
    *lpw++ = 0;             // No creation data

    //-----------------------
    // Define a Help button.
    //-----------------------
    lpw = lpwAlign(lpw);    // Align DLGITEMTEMPLATE on DWORD boundary
    lpdit = (LPDLGITEMTEMPLATE)lpw;
    lpdit->x  = 55; lpdit->y  = 10;
    lpdit->cx = 40; lpdit->cy = 20;
    lpdit->id = ID_HELP;    // Help button identifier
    lpdit->style = WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON;

    lpw = (LPWORD)(lpdit + 1);
    *lpw++ = 0xFFFF;
    *lpw++ = 0x0080;        // Button class atom

    lpwsz = (LPWSTR)lpw;
    nchar = 1 + MultiByteToWideChar(CP_ACP, 0, "Help", -1, lpwsz, 50);
    lpw += nchar;
    *lpw++ = 0;             // No creation data

    //-----------------------
    // Define a static text control.
    //-----------------------
    lpw = lpwAlign(lpw);    // Align DLGITEMTEMPLATE on DWORD boundary
    lpdit = (LPDLGITEMTEMPLATE)lpw;
    lpdit->x  = 10; lpdit->y  = 10;
    lpdit->cx = 40; lpdit->cy = 20;
    lpdit->id = ID_TEXT;    // Text identifier
    lpdit->style = WS_CHILD | WS_VISIBLE | SS_LEFT;

    lpw = (LPWORD)(lpdit + 1);
    *lpw++ = 0xFFFF;
    *lpw++ = 0x0082;        // Static class

    for (lpwsz = (LPWSTR)lpw; *lpwsz++ = (WCHAR)*lpszMessage++;);
    lpw = (LPWORD)lpwsz;
    *lpw++ = 0;             // No creation data
POINT pt;
pt.x=123;
pt.y=456;
    GlobalUnlock(hgbl);
    ret = DialogBoxIndirectParam(hinst,
                           (LPDLGTEMPLATE)hgbl, //HGLOBAL
                           hwndOwner, //IN_0
                           (DLGPROC)DialogProc,(LPARAM)&pt);
    GlobalFree(hgbl);
    return ret;
}
BOOL CALLBACK DialogProc (HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
POINT* pt=(POINT*)lParam;
TCHAR buf[256];
switch(message)
{
case WM_INITDIALOG:
        {
//wsprintf(buf,"%d+%d=%d",pt->x,pt->y,123);
wsprintf(buf,"%d+%d=%d",((POINT*)lParam)->x,((POINT*)lParam)->y,123);
MessageBox(hDlg,TEXT("Created!"),0,0);
SetWindowText(hDlg,buf);
        }
return (TRUE);
case WM_CLOSE:
        {
            EndDialog(hDlg,0);
        }
return (TRUE);
case WM_COMMAND:
switch (LOWORD(wParam))
{
case IDCANCEL:
            {
                SendMessage(hDlg, WM_CLOSE, 0, 0);
            }
            return (TRUE);
case IDOK:
            {
                MessageBox(hDlg,TEXT("OK Pressed！"),0,0);
            }
return (TRUE);
}
return (FALSE);
}
return (FALSE);
}
```


 一般情况下，顺利编译而没有运行窗口，都是rc脚本有问题