MINIGUI下的计算器

#include 
#include 
#include 
#include 

#include 
#include 
#include 
#include 
#include 
#include 

#define NO1_IU_SLEDIT	701
#define NO1_IU_BUTTON1	702
#define NO1_IU_BUTTON2	703
#define NO1_IU_BUTTON3	704
#define NO1_IU_BUTTON4	705
#define NO1_IU_BUTTON5	706
#define NO1_IU_BUTTON6	707
#define NO1_IU_BUTTON7	708
#define NO1_IU_BUTTON8	709
#define NO1_IU_BUTTON9	710
#define NO1_IU_BUTTON10	711
#define NO1_IU_BUTTON11	712
#define NO1_IU_BUTTON12	713
#define NO1_IU_BUTTON13	714
#define NO1_IU_BUTTON14	715
#define NO1_IU_BUTTON15	716
#define NO1_IU_BUTTON16	717
#define NO1_IU_BUTTON17	718
#define NO1_IU_BUTTON18	720
#define NO1_IU_BUTTON19	721
#define NO1_IU_BUTTON20	722
#define NO1_IU_BUTTON21	723
#define NO1_IU_BUTTON22	724
#define NO1_IU_BUTTON23	725
#define NO1_IU_BUTTON24	726

#define   Max  40

static int flag1=0;//判断是否是 第二个参数0表示第一个参数，1表示第二个参数

static int CalculatorWinProc（HWND hcwdint messageWPARAM wParamLPARAM lParam）
{
	HDC hdc;
	RECT rc;

	static int time=0;
	int longsize;
	char buffer1[Max];
	char buffer2[Max];
	char *str=NULL;
	char *ptr=NULL;
	static char signal;
  	static float tal=0.0;
  	static float tall=0.0;
 	static float sum=0.0;
	
	switch（message）{
		case MSG_CREATE:
			CreateWindow（CTRL_EDIT““WS_VISIBLE|WS_BORDER|ES_RIGHTNO1_IU_SLEDIT
			             352025030hcwd0）;

			CreateWindow（CTRL_BUTTON“Backspace“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON1
			             35606530hcwd0）;
			CreateWindow（CTRL_BUTTON“CE“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON2
			             100606030hcwd0）;
			CreateWindow（CTRL_BUTTON“C“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON3
			             160606030hcwd0）;
		 	CreateWindow（CTRL_BUTTON“返回“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON24
			             220606030hcwd0）;
			
			CreateWindow（CTRL_BUTTON“7“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON4
			             35905030hcwd0）;
			CreateWindow（CTRL_BUTTON“8“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON5
			             85905030hcwd0）;
			CreateWindow（CTRL_BUTTON“9“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON6
			             135905030hcwd0）;
			CreateWindow（CTRL_BUTTON“/“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON7	
			             185905030hcwd0）;
			CreateWindow（CTRL_BUTTON“sqrt“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON8
			             235905030hcwd0）;
			
			CreateWindow（CTRL_BUTTON“4“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON9
			             351205030hcwd0）;
			CreateWindow（CTRL_BUTTON“5“WS_TABSTOP|WS_VISIBLE|BS_DEFPUSHBUTTONNO1_IU_BUTTON10
			             851205030hcwd0）;
			CreateWindow（CTRL_BUTTON“6“WS_TABSTOP|WS_VISIBL